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AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil

Product code : DMEQT-EA

4.9 star rating Read 1,543 reviews

Customer Rating

4.9

92% would recommend

  • 5 1478
  • 4 45
  • 3 9
  • 2 3
  • 1 8

AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil

4.9 star rating Based on 1,543 reviews
  • 5 star rating
    I will continue to use each time
    By  Terry,  a  Verified Buyer  from  AZ  on  October 25, 2017
    Great product, will use each time I change oil
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  • 5 star rating
    Great product!
    By  Ron,  a  Verified Buyer  from  AZ  on  October 21, 2017
    I've been using Amsoil for 15 years now. Diesels, and family's automobiles, utvs, boats, and more. I know i can trust Amsoil, and have extended the life of all my equipment. Great oil, filters, and much more.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    I've always used Amsoil products in my 2007 Dodge
    By  Ray,  a  Verified Buyer  from  Anacortes, WA  on  October 21, 2017
    Always change my oil every 6 months. I have only 65K and mainly tow a 30 foot trailer in the summer months. I use Amsoil, engine oil, transmission fluid, differential oil, and filters. Great products.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product and pricing
    By  Tattooedguy,  a  Verified Buyer  from  Sherwood park ab  on  October 21, 2017
    Amsoil is a great product, great service, I use there products in my 2016 dodge diesel
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil Synthetic Diesel Engine Oil
    By  Dusty,  a  Verified Buyer  from  Albuquerque  on  October 21, 2017
    Best diesel oil on the market. Wouldn't be caught using anything else. Read the specs.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Repeat customer
    By  Willie,  a  Verified Buyer  from  Las Vegas  on  October 21, 2017
    I've used this oil for a while now and all I can say is I love it. My truck runs smoother and doesn't burn oil when I'm pulling.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    I purchase this oil for every chance
    By  Blake,  a  Verified Buyer  from  Metamora, MI  on  October 15, 2017
    I purchase this oil for the soot contamination, fuel economy gains and the wear additive package. I can tell my Duramax doesn't "tick" anymore and the fuel economy is much better. I can also go longer between changes. All in all a great product.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Will use again and again
    By  Fordfan,  a  Verified Buyer  from  Valatie New York  on  October 11, 2017
    excellent
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil 5w 50
    By  Cooory Ed,  a  Verified Buyer  from  Thurman Ohio  on  October 05, 2017
    Great oil I run amsoil in everything
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Moving all my vehicles over to 100% synthetic
    By  Muleboy,  a  Verified Buyer  from  South Texas  on  October 01, 2017
    Swapped my Duramax diesel over to this oil. I want this vehicle to last for years so I am going to use the best oil I can. I plan on doing oil analysis as well to get the most out of this product.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    One of the best products for a diesel on the market
    By  Denali 16,  a  Verified Buyer  from  Cedar park tx  on  September 30, 2017
    Can't be more happy with the oil I've been running it for almost 10 years your missing out on the quality of this oil if your not using it
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product!
    By  Nate,  a  Verified Buyer  from  Ohio  on  September 20, 2017
    Engine runs quiter and seem to get better fuel mileage. Very happy with the oil product.
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  • 5 star rating
    Diesel oil
    By  Chris,  a  Verified Buyer  from  Everett wa  on  September 15, 2017
    I like this oil in my 99 ford power stroke. Holds up well.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    I only run this oil in my diesels
    By  Kyle,  a  Verified Buyer  from  Grande Prairie AB  on  September 14, 2017
    I have four dodge diesels and a cat powered welding machine and I run this oil year round with zero issues. I do oil changes every 25000kms.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    I would buy this product again and again!
    By  Pat,  a  Verified Buyer  from  San Angelo, Texas  on  September 14, 2017
    I use this oil in my 2014 Dodge Ram EcoDiesel. Amsoil updated the oil from 5W-40 to 10W-40 based on Dodge recommendations. Great oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Like 6x protection
    By  Jon Driver,  a  Verified Buyer  from  Florida and beyond  on  September 13, 2017
    Under heavy usage and need peace of mind
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Will always use this oil
    By  Mr.AH,  a  Verified Buyer  from  Stuart Fl  on  September 10, 2017
    Use this oil in a tow vehicle never loses a drop of oil in 5000 miles
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil
    By  Gerald Barber,  a  Verified Buyer  from  NEWPORT Michigan  on  September 09, 2017
    Although I've never use this oil before I'm confident I'll love it as I've been useing it in my M/c for years ! You just can't go wrong with amsoil!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Must be good
    By  Chris,  a  Verified Buyer  from  Holt MI  on  September 07, 2017
    My engine is still running and since I can't see inside it, it must be working.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Yes
    By  No,  a  Verified Buyer  from  Joliet Illinois  on  September 05, 2017
    It kept the engine cool. It doesn't break down.
    Bottom Line
    Yes, I would recommend this to a friend.
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