Product Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Current Rating: 4.86 out of 5 stars
Votes & Reviews: 51 vote(s) and 101 user reviews.
Reviewed by Flint: 
it's a good product but I don't like the gallon jug design. They're hard to pour.
Reviewed by Leslie:
Have used this oil in my Duramax since it finally broke in at 70,000, I now have 255,000 on it and every oil test came with 50% oil life after 10,000. I do a lot of short trips along with really long trips towing.
Reviewed by Corey:
Makes changes a snap in my duramax. The 2 1/2 gallon jug fills her to the top of the stick. Great product and easy to order too
Reviewed by Jeremy:
2004 dodge Cummins Great oil Truck runs awsome
Reviewed by Billy:
I have used amsoil in my 2003 dodge ram 3500 the oil, performs very well has always checked good with an oil analysis 222,000 miles without ant oil related problems towing horse trailers and now a 36ft 5th wheel
Reviewed by Yaremchuk:
Very good quality.
Reviewed by Kenneth:
Boatload of additive for Excellent TBN analysis between extended oil changes.
Reviewed by Brandon:
Great oil. Love it so far!!
Reviewed by Andrew:
I use this in my 98 Dodge Ram 2500HD with the 5.9L Cummins 24v engine. It's been great to the engine.
Reviewed by Mike:
This motor oil is used in my F250 work truck. I've been using it for around 130,000 miles
Reviewed by Dennis:
Great lube. Have used in gas and diesel motorhomes
Reviewed by Joey:
Great product. I have used this oil in this truck for 20 years. I find it runs as good as the day that I bought it.
Reviewed by John:
2004 Cummins 5.9 300000+ miles still has cross hatch in the cylinders
Reviewed by Ricky:
Awesome oil I run 10/30 in my 6.0 powerstroke so smooth and great
Reviewed by Jarrod:
I use this oil in my 2006 Duramax with 180,000 and my 2006 Mercruiser. Oil works great.
Reviewed by Terrance:
I've used this product in my '98 Dodge 3500 Diesel 4x4 for 18 years. It has worked excellent for me the whole time. I've tried other products before I tried Amsoil and they failed excessive heat and caused my truck to clatter. Amsoil works flawlessly for extended drain interval and for storage. I plan to continue Amsoil products in the near and distant future exclusively.
Reviewed by Andy:
This oil is amazing i change it every 20 miles i also picked up 3.5 mpg after 1st oil change 10 years ago love it and recommend to every gm diesel owner out there
Reviewed by Sammy:
Been using AMSOIL for over 20 years. Great products!
Reviewed by Mike:
I use it in my Chevy gas trucks one has over 307000 miles on it never been into it 5.3L LS
Reviewed by Ken:
Great oil, I have been running this in my 2500 4x4 dodge diesel for 10 plus years. 302,000 miles on it. Also use it in my Kubota Tractor, run it for 15,000 miles per oil change, change oil filter at 7500. I have sent the oil to lab several times, after 15,000 miles running time, oil always comes back good, never breaks down, good product,
Reviewed by Herbert:
I have gotten great results with the oil. Have gone 40,000 miles on my oil changes. And I am taking baby steps towards 100,000 miles and beyond.
Reviewed by Rob:
Freat
Reviewed by Richard:
I use in my 2001 F350 powerstroke on pull 35 ft 5th wheel.
Reviewed by
Vipra:
15w40 AME & a 15micron Donaldson P551018 for my annual oil/filter changes.
From Southern summers to Northern winters, UOA shows that this combo can't be beaten for my over fueled, compounded decathlete 12v Cummins.
Don't ever stop making this outstanding CI4+ oil.
Reviewed by Usgr:
Been using since 2003 in Duramax. Handles all climates.
Reviewed by Easy:
Switched to amsoil in my 2006 f250 powerstroke. My truck now starts much better, and runs quieter and smoother!
Reviewed by JC:
I use this oil in my JD 4720, I am very happy with it, it serves my purpose for what I use it for.
Reviewed by
Raney1999:
Only oil I've ever used in my 6.7 Cummins for last 100k aside a rotella hear and there. Also use the amsoil oil filter. Works well together !
Reviewed by Danny.W:
I've run Amsoil in my 05 Cummins 5.9 for around 200k. And I've used all the different diesel oils Amsoil has to offer from highest of performance to the eco price. But In my leaky 300k plus and climbing work diesel. the marine oil always comes out with just about as much as I put in 10k ago. And the others I would sometimes be up to 3Qt short when drained. Like it's gets so thin that it finds completely new ways to seep out !! But that why I
like to order the heavier oil. Lastly my whole truck runs on Amsoil rears,difs,transfer and engine, and I strongly believe that Amsoil is the soul reason why my Cummins runs as good as it does at 310k miles!! Thanks for the spectrum or synthetic lubes to chose
from!! Two thumbs high from this guy!!
Reviewed by Gary:
It does not break down like other oils, doesn't get up, or foam up. Longer time between changes.
Reviewed by Ddenham:
Great product, been using this product for years.
Reviewed by Cope:
Amsoil heavy duty 15w-40 marine diesel oil has proven to me that it will protect my Cummins engines. I have older high mileage Dodge trucks that get driven on the highway, gravel roads in -15F cold and 100F heat and the lab results from my oil samples have continually came back great. At a minimum I put double the factory recommended mileage on this oil before changing, depending on driving conditions.
Reviewed by ROLAND:
Reduced engine noise (duramax)
Reviewed by Cummins lover:
I've been using Amsoil diesel and marine for many years I drive 200 miles a day in my Cummins in and out of petroleum refineries 6 to 7 days a week and I work my truck hard! Amsoil has never let me down! This is a great product
Reviewed by Jeff:
I have been using Amsoil in my 2003 Chevy Duramax for its entire life with great results.
Reviewed by Tim:
Been using in my 02 duramax since I bought it in 06 oil stays very clean never black like many diesels
Reviewed by Charles:
This 15w-40 Marine oil is all I use in both my 2001 300hp Mercruiser boat engines since 2011. Why you might ask? 1) Only oil that has shown to lubricate the turbo blades on my son's boat diesel super-charger.
2) When son's oil hose ruptured at full engine speed, repair mechanic stated that engine only survived due to the oil's lubrication properties.
Reviewed by Kerry:
We have been using this product in our 2004.5 Dodge diesel since 2010. The truck had 110K miles on it when we switched over and added the micro-filtration unit. We now have some 329K miles with about 120K miles of that amount while hauling commercial freight. Now back to my daily driver and still using this oil.
Reviewed by Chum:
Product is great. 8-10,000 miles between oil changes. Price is right. You might as well go with the best.
Reviewed
by Matt:
It helps my 7.3 powerstroke start better since the injectors are oil fired it will start when 0 degrees without being plugged in
Reviewed by Flyoften:
Oil is like a lot of things where the positive traits are hard to quantify. You just have to know it's good and working. I run it in a Ford 6.0 so it has to be good.
Reviewed by LEXUSMAN:
I'VE BEEN USING AMSOIL SINCE 2004 AND I JUST LOVE THESE PRODUCTS. IN MY OPINION AMSOIL IS THE BEST OIL OUT THERE NOTHING COMES EVEN CLOSE. I HAVE A 2002 TOYOTA SIENNA WITH 570.000 MILES
YES YOU SAW IT RIGHT 570K MILES AND THAT THING JUST KEEPS ON GOING AND GOING, IT JUST DOESN'T WANT TO QUIT. STILL ORIGINAL ENGINE AND TRANSMISSION. PEOPLE TOLD ME TO GET RID OF IT BUT I TELL THEM IT'S NOT THE TIME YET IT STILL RUNS LIKE A CHAMP AND EVERYTHING IS WORKING ON IT. I USE AMSOIL PRODUCTS ON MY OTHER CARS AS WELL AND A FEW OF MY FRIENDS GOT HOOKED ONCE THEY TRY IT AND THEY NEVER WENT BACK TO THE OIL THEY USED TO USE. THANK YOU AMSOIL FOR YOUR GREAT PRODUCT, KEEP UP THIS AWESOME WORK AND I WISH THAT AMSOIL TO BE AROUND FOR THE NEXT 100 YEARS.
BEST WISHES AND GOD BLESS AMSOIL!!!! ISTVAN.
Reviewed by Donkey Boy:
All we use in all our truck&tractor,
Reviewed by Me:
I have been using this oil sense I bought my 07 Dodge Ram diesel new 12 years ago. I go 15k between oil changes. I'm glad I started using this Oil and the by-pass system when I did. I have 250k on my truck now and plan to go another 250k. Amsoil has been great every time I place an order as well.
Reviewed by Crowley:
Have been using heavy duty diesel marine synthetic motor oil in my duramax work truck for last 70,000 miles. Seems to have superior protection and less breakdown under heavy loads and extreme conditions.
Reviewed by Marv:
Motor oil
Reviewed by Bullwinkle 119:
This vehicle I drove everyday for work. Change the amsoil 15-40 marine/ diesel every 7,000 to 9,000 miles. Chose the 15-40 because of the drastic temp changes in Texas. The transmission gave up motor still strong didn't want to put any money in it sold it to a friend. Amsoil is an amazing product. Well worth the money.
Reviewed by M Grieshop:
I run this oil all winter long,every winter
Reviewed by
Bigguns:
I use this oil in my 7.3 liter van for the fact that it does great in the cold weather that I get into. I travel a lot in the northern states and it always turn over.
Reviewed by Steve:
After taking professional training for oil analysis it occured to me this was a suitable option. I have a diesel truck that gets infrequent use and having a 14 tbn gives me comfort in fighting acidity while in storage.
Reviewed by ShovelJockey:
I've got a strong running 7.3 with 292,000+ on the clock. Have been using another oil with excellent UOA reports and getting close to 10k on oil changes. Decided a while back it was time to see what this Marine Amsoil was all about. Immediately noticed my injectors were much, much quieter. Will be sending a sample in for testing in about 2000 miles and see how things compare.
Reviewed by Roy:
I use this in my turbocharged Subaru during the cold months. It has loads of zinc and phosphorus so it protects the turbo, and its high viscosity index provides great cold start protection as well as high temperature protection in the turbo bearings. My motor and turbo have over 80,000 miles on them and are still running like new.
Reviewed by Reree:
Does what it says it does, went from running my oil from 5,000 miles to 20,000 miles. Saves money and time , engine temp runs cooler when under a heavy tow going up a grade, oil doesn't smell burnt when doing a change easier start up in cold whether with not having the truck plugged in. Extremely satisfied with this product!
Reviewed by Eric:
I change oil every 15k and I think is still good. 350 ml Bluetec
Reviewed by Marmon:
Has improved the performance , better fuel economy ,easier starting saves money from not having to change oil.I also use cetane boost and injector cleaner
Reviewed by speedy:
I feel that it is a superior product.
Reviewed by Jack:
I run an Amsoil bypass filter system and I am religious about changing filters and doing oil analysis. My old
"rig" has always started well in winter and I only have to add oil when I change my filters.
I have only changed my oil 4 times in the 17 years I've owned her. I would recommend all Amsoil products I have used.
Thanks to you all from me and my truck for helping us keep on keeping on.
Reviewed by Ted:
Works good when dealing with interior
Alaska weather of - 40 degrees.
Reviewed by Randy:
I use amsoil in everything I own! Works great in my 06 duramax,01 powerstroke and Canam defender side by side. Peace of mind for sure!!
Reviewed by Mark:
I use this oil for my 1999 Ford F250 7.3 liter diesel. This oil has very good longevity. For a diesel I change this oil about every 10,000 miles. It cuts down on oil change intervals. I am sure it could go much longer.
Reviewed by Mr. Fix it:
I have been using this oil in my Sequoia, Continental, and motorhome for 15 years. Tell me what other oil lasts 25 k in a gas engine?
Reviewed by Derek:
I cannot say enough about this oil. My truck starts easier, runs better, and probably gets better fuel economy. I "push" Amsoil on all my friends because I believe in it so much.
Reviewed by Spotted puppy:
Amsoil is the only oil, grease and lubes that have been used in our 2001 F-250. It now has 210,000 miles with no use of any oil. This is our second diesel truck that we have use only amsoil. The other truck had 300,000 when we sold it. It did not use any oil either.
Reviewed by Master Craft:
I use this oil in my Master Craft boats and it keeps them working perfectly year after year after year.
Reviewed by
Machineman:
Have used this oil for years, would not use anything else in my diesel truck
Reviewed by Daniel:
I've used AMSOIL products for years. I have an 2004 F350, 6.0 liter and this is the only oil I run. Amsoil keeps the engine clean and long lasting. Also use AMSOIL in my 2007 Expedition. Both vehicles have close to 200,000 or more than. Still running strong.
Reviewed by Chris:
Run these fluids in all vehicles
Reviewed by Barry:
My diesel will use nothing else!
Reviewed by Tw:
Daily driver ,200000+ miles runs like new
Reviewed by Whododgeit:
It great oil and keep engine running life
Reviewed by ron:
1995.dodge.2500.12.valve.5/9.cummings.diesel.only.500.miles.since.change.have.notice.better.fuel.efficiency
Reviewed by Buck:
Works perfectly
Reviewed by L. Williams:
Greetings,
I have a 2001 Hummer H1 and I recently 'rescued' a 1995 Hummer H1. Now, both of these vehicles are
getting closer to the Classic status. I am bringing the 1995 back to life. I have changed the diff oil, hub oil,
engine oil, trans oil, and coolant with Amsoil. The 1995 is running strong now.
I take the vehicles out in the wilderness. I see no reason to risk my family getting stranded by using a cheap/sub-standard product.
Adventure on!
Reviewed by LBZ Duramax:
I've been using Amsoil 15W-40 Heavy-duty Diesel and marine oil in my 2006 Silverado 2500HD for 10 years now. Oil and filter change intervals average around 12,000 to 18,000 miles.
The truck now has over 355,000 miles on it and it still runs great! I never have to add any oil between oil changes either. If you are on the fence about using this oil in your vehicle, I say, go for it! You won't regret it!
Amsoil is top of the line!
Reviewed by Jason:
I have an 06 Dodge with the Cummins. These 'older' diesels required a CI4+ oil. There is much debate in the oil world about the qualities of the newer oils vs the older ones - specifically that the old CI4+ oils had more detergents in them, which the older engines liked better. Even though the newer oils are backwards compatible, they apparently do not have the same detergents in them. This has been the only CI4+ rated oil I can still find. Its the only oil I use in the Cummins.
Reviewed by Mr Diesel:
Used this oil for 27 years and never had a oil leak or any engine failure. Put 300,000 miles on Dodge TURBO Cummins, check but never had to adjust valves. Only oil I will use.
Reviewed by Eric:
Been using this on 7.3 heui truck oil shearing monsters. I'm at 9k and been pushed to 15k for next oil analysis definitely a efficient product and same $$$$ on oil changes..
Reviewed by chin00kie:
I maintain seven vehicles so changing oil could be a full time job. I use Amsoil because it is the best oil made and the best filter in the industry. My twin sons just became 16. For their birthday I had them learn how to change the oil in their trucks by converting them to Amsoil . This oil seems to be better suited to my older VW Jetta than the other Diesel oils. I use less of this oil. My car has nearly 300,000 miles and has always used about 4 oz of oil every 500 miles. With this oil that amount is cut in half.
Reviewed by Mark:
I also use the motorcycle kit for oil and filter changes in my Harley Davidson
Reviewed by Custom ROD:
I never really know if I'm choosing the best product for my applacation. Wish
I could call my friends at Amsoil like they do a Roadkill Garage
Reviewed by Jeff in Southern Oregon:
I have a 2005 Dodge 3500 with a 5.9L diesel. From the first time I changed the oil or had it changed, I have been using Amsoil 5w-30 with the Amsoil Filter. The truck now has over 435,000 miles and just keeps going! I do a lot of Freeway driving all across the West, sometimes pulling a stock trailer. Amsoil products keeps it going. I average about 25-28 MPG, and do about 35K-40K miles per year. Thanks for keeping me on the road!
Reviewed by Thundercat:
This is my winter oil for my 1998 Dodge Ram 5.9L diesel. Use this oil with my Amsoil bypass system.....change to it in November (from 15-40). Have been using this as winter oil for many years with absolutely no issues, truck starts well whether plugged in or not.
Reviewed by Mike:
Was having some stiction issues with my 7.3. Was recommended this product by an oil specialist. Never heard of Amsoil before I used it. Seemed like my engine loved it as I could tell that it started right up and seems to have restored any loss of power. Stiction seems to have gone away even in cold start ups. Will exclusively use this product.
Reviewed by Wounded Knee:
This review is based on a van that I no longer have. I used Series 3000 in that van for years... I believe 3 years?? Perhaps 4. At the time that it suffered a rollover and was "totaled", the engine oil pressure (a major indicator of bearing wear) was exactly as high as when the van was new to me.
Reviewed by Bob:
I've been using Series 3000 5w-30 in my 2005 Ram 2500 with Cummins engine for 5 years now. I change it once a year, every 20,000 miles (without sampling...vlimd faith). Truck had 140k miles when I bought it and first put in Amsoil....it now has 240k and runs perfectly. I will always use Series 3000.
Reviewed by Peter the treat:
16 plus years in gas and diesel engines, no regrets!!
Reviewed by Bow hunter Matt:
The only oil I have ever used that frees up extra horsepower
Reviewed by Sonny:
I have been using Amsoil lubrication in all of my cars, trucks, tractors and compressors since 1974. I am very happy with the results I have had with Amsoil - higher mileage, better cooling due to less friction and longer oil change schedule.
Reviewed by Wil:
I've used Amsoil for over 40 yrs. starting with my 1st VW diesel around 1973 and never had a worry.
Reviewed by Jack:
I wouldn't crank up my 2001 Powerstroke 7.3 diesel without Series 3000 in the crankcase !! It's amazing protection, and allows me to only change oil when needed. The auxillary remote filtration system I purchased from Amsoil allows me years of worry-free protection !!!! NOTHING better !!!!
Reviewed by Jack:
I wouldn't crank up my 2001 Powerstroke 7.3 diesel without Series 3000 in the crankcase !! It's amazing protection, and allows me to only change oil when needed. The auxillary remote filtration system I purchased from Amsoil allows me years of worry-free protection !!!! NOTHING better !!!!
Reviewed
by MATT:
I've been using using this product in my 2001 Ford Excursion 7.3L Diesel. Change every 15,000 miles . 288,000 miles so far ! High pressure oil actuates the fuel injectors on this engine. Still on original injectors. I believe the full synthetic oil has helped extend the life of the injectors. Several of my friends have had to replace their injectors on similar Ford diesels. Looking to put 500k miles on my Excursion. Amsoil products in transmission and rear end as well.
Reviewed by Scott:
Since i have used this product i have noticed improved fuel economy in my 3.0 diesel engine. This product has a very high film strength and good lubricity. I will watch the performance as time passes..
Reviewed by TN:
I have experienced quite a few problems with the 6.0 Powerstroke engines and I can say that my 6.0 runs like a top after switching to this oil. As far as I am concerned this is the only oil that I will ever put back into this machine - it has made a noticeable difference, especially in cold weather. I was skeptical at first but this oil was made with the 6.0 in mind. The standard 15w-40 oils tend to get sheared down by the High Pressure Oil Pump meaning they are 15W-40 when you put it in the engine but it is not 15W-40 when it comes back out. Where the Series 3000 oil goes in at 5W-30 and comes out at 5W-30.
Reviewed by COL DAVE:
I have been using this oil for over 5 years now and I would not change for any other brand. Amsoil is easy to work with and they ship fast. Great company.
Reviewed by DON'T HAVE
ONE:
I BOUGHT A USED 2007 DODGE DURANGO LIMITED WITH A 4.5 L GAS ENGINE IN 2007. IT HAD 18,000 MILES ON IT AND NOW HAS 190,000 MILES. I HAVE USED THE SERIES 2000 OIL ITS ENTIRE LIFE, CHANGING EVERY 10,000 MILES. IT DOES NOT USE ANY OIL IN A 10,000 MILE INCREMENT.
Reviewed by JP:
I have used this product for years. I keep my vehicles for many years so important to keep wear under control. When my trucks hit 45000 miles I switch to Amsoil 3000 and have gotten longevity on all with no major engine trouble. Never had to plug my vehicles in, in cold weather. And I've had to travel upstate NY in very cold weather.
Reviewed by Chip:
Utterly boring, reliable oil. 12 quarts + EaO80 filter + 9.1k miles = no oil burned + analysis came out excellent :-)
Re: update after 9k miles
Chip, thank you for confirming the outstanding performance of Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil, and that it provides the driver the security of knowing their engine is going to provide trouble-free operation mile after mile. Based on the oil analysis, it is still fit for use. Replied by Tech Admin
Reviewed by Chip :
I'm lazy - changed the main bearings this morning with the crank still in place. Along with a new oil pump, oil pickup, 6 quarts HDD + EaO15, I'm good for at least a year.
Low temp flow/longlife like ATM, and Zn/Ph/bearing protection/film strength/high temp stability like ZRT/Dominator, this oil is a winner, and personally recommended by Alex Farkas.
I hear the founder of AMSOIL uses this too.
"The HDD has a higher level of ester content, a higher Base Number Detergent/Dispersant package, and two new FM/AW components; one an ester and the other an organometallic compound."
Canada
United States
Best Oil for my 7.3!
The ONLY oil i use in my 2002 F350 7.3 Powerstroke. I get 25,000 miles between oil changes!