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AMSOIL Signature Series 5W-50 100% Synthetic Motor Oil

Product code : AMRQT-EA

5 star rating Read 6,845 reviews

Customer Rating

5

90% would recommend

  • 5 6662
  • 4 130
  • 3 23
  • 2 9
  • 1 21

AMSOIL Signature Series 5W-50 100% Synthetic Motor Oil

5 star rating Based on 6,845 reviews
  • 5 star rating
    Top Shelf
    By  GLENN,  a  Verified Buyer  on  January 06, 2026
    Product is ALWAYS delivered in a timely fashion. As they say, you get what you pay for.....and Amsoil delivers. Highly recommend.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Only the best
    By  BOB,  a  Verified Buyer  from  Ontario Canada  on  January 06, 2026
    Wifes Honda 1.5T seems to like this much better then the 0w20 - very happy with it
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excepcional producto
    By  MARCOS,  a  Verified Buyer  from  TX  on  January 06, 2026
    Este producto vale cada dólar cambie el aceite a las 3mil millas de haber sacado el auto del concesionario y el motor tu un cambio del cielo a la tierra.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Signature Series 5W-30
    By  BOB,  a  Verified Buyer  from  Vancouver B.C.  on  January 06, 2026
    Just did my first oil change with this oil. Too early to tell the results however, ordering and delivery was easy and quick
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Helps my high mileage engine last
    By  JoyBoy,  a  Verified Buyer  from  Las Vegas,NV  on  January 05, 2026
    I drive a lot for my job and my engine normally uses 0w20 and changing to Amsoil. Going up to a 0W30 was to me is a good choice. Been using it since my 2022 was new and now has 78,000 miles and no problems engine runs smooth as glass.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Tried it and impressed!
    By  DEVAN,  a  Verified Buyer  from  Canada   on  January 05, 2026
    There was a lot of positive word on forums and a few mechanics I know. Thought I would finally give it a try in my 3.6l penastar engine. Noticed a difference right away. Engine ran smoother, reved quicker and seem to pick up a little in fuel mileage. Overall happy with Amsoil!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil Signature Series 5W-20
    By  DENISE,  a  Verified Buyer  from  Burlington Ontario  on  January 05, 2026
    I would Highly recommend it. My son and Husband love this oil for there trucks . My son is the one that recommended this oil. Engines run better with this oil. Its also very affordable. Thank you for your service
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil
    By  MICHAEL,  a  Verified Buyer  from  Kansas  on  January 04, 2026
    Best oil you can buy
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil
    By  JOE,  a  Verified Buyer  from  Boise  on  January 04, 2026
    I only trust AMSOIL in my vehicles and recommend to all.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Product
    By  RICHIE,  a  Verified Buyer  from  Delaware  on  January 04, 2026
    Purchased this for my Chevy pick up. It was suggested by other amsoil users.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    My purchase of Amsoil
    By  BILLY,  a  Verified Buyer  from  Phelan, CA  on  January 04, 2026
    The oil is top notch! Amsoil is the best! But my experience with Customer Service of this company was very bad!!! I placed an order for oil and then I was given grief for ordering (too much)!!!! 8 gallons. No reason given!!! Still no reason given. I had to explain my reasoning for purchasing 8 gallons and then no reply. Next thing I know my money was refunded with no explanation. I then started searching for other ways to purchase the oil as my husband is a mechanic and oil appeared at my door and money taken from my account after refunded with still no explanation. Very bad Customer Service!!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Motor oil
    By  ORLANDO,  a  Verified Buyer  from  Houston Tx  on  January 03, 2026
    Great oil , super fast shipping
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil is the best oil I've used
    By  RAYMOND,  a  Verified Buyer  from  MD  on  January 02, 2026
    Ever since I started using Amsoil, I've gotten better fuel economy in my F150. I drove to Florida from Maryland and was getting 22 MPG, but locally I was only getting 17 to 18 MPG on highway using the regular oil. Reverted back to using Penzoil from Jiffy Lube and my MPG went back down and when I changed back to Amsoil the mileage improved. I'm a true believer in this oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Always a sure bet!
    By  PETER,  a  Verified Buyer  from  Wisconsin   on  January 02, 2026
    Amsoil has always been a leader since its beginning. It out performs, it does its job second to none. It cleans and protects ,it sets the bar for others to follow. It may cost a bit more but isn’t protecting one of your largest financial purchases worth it? It is to me, I want the best for my 50K truck I won’t compromise, this oil has been tested time and time again and has always came out on top. Bottom line…. I love it! Do yourself a favor use this oil or run your motor to junk to soon ,the choice is yours.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil flow
    By  GEARY,  a  Verified Buyer  from  Noble  on  January 02, 2026
    I like the research I found the good stuff about it I like the fact that it's flow rate when it's super cold is above all the rest
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good Stuff
    By  BRIAN,  a  Verified Buyer  from  Spring Hill, FL.   on  January 02, 2026
    Love the quality of the signature series oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL 5W-30 SIGNATURE SERIES
    By  RAMIRO,  a  Verified Buyer  on  January 01, 2026
    If someone is out there looking for engine oil that is beyond premium look no further. My 2013 Civic SI 2.4L I4 engine has 181K miles still counting and it burns 0 drops of oil. I do 5K mile interval changes and no issues what so ever. I started using this oil for my 2009 Toyota Avalon 3.5L V6 as well, 250K miles and counting no oil consumption yet. For those who don't believe me I will start posting every oil change on youtube. Many are skeptical about my cars not burning oil but I always measure what comes back out and it matches what always goes in. So 5 quarts go in and 5K miles latter 5 quarts come back out.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great products for your performance engine.
    By  CHARLES,  a  Verified Buyer  on  January 01, 2026
    The product is great. Love the products.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great oil
    By  JEFF,  a  Verified Buyer  on  January 01, 2026
    I’ve been using Amsoil for a number of years now. I don’t plan on changing.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product
    By  DAVID,  a  Verified Buyer  on  January 01, 2026
    Been using this product for 5+ years in my older Ram 2500. No complaints
    Bottom Line
    Yes, I would recommend this to a friend.
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