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AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil

Product code : ALMQT-EA

5 star rating Read 6,871 reviews

Customer Rating

5

90% would recommend

  • 5 6687
  • 4 130
  • 3 24
  • 2 9
  • 1 21

AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil

5 star rating Based on 6,871 reviews
  • 5 star rating
    Good oil
    By  VINCENT,  a  Verified Buyer  on  February 11, 2026
    Very good engine oil
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Only oil I use now period
    By  ANTHONY,  a  Verified Buyer  from  NC  on  February 10, 2026
    Love all there products
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    They say all oil is created equal.
    By  JASON,  a  Verified Buyer  on  February 10, 2026
    This can be further from the truth. I have an 07 Jeep SRT 8. The previous owner was using another top oil brand. And after my truck would get to optimal running temperature. My oil pressure at idle would drop to 9-10 psi. I changed the oil after 3k miles and heard great reviews on AMSOIL. I used Amsoil Signature series oil. And my oil pressure at running temperature is appro 24-26psi. I will definitely spend the little bit more money. Knowing AMSOIL is absolutely Superior. Customer for life.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The only oil you need
    By  LUKE,  a  Verified Buyer  from  Silver Spring, Maryland  on  February 09, 2026
    I’ve been running AMSOIL in my 2020 Jeep Gladiator Mojave and I’m seriously impressed. The engine runs noticeably smoother and quieter, even after long drives and hard use. I do a mix of highway, city, and off-road driving, and AMSOIL has held up perfectly in all conditions. Throttle response feels sharper, and I’ve had zero issues with performance or oil consumption. It gives me real peace of mind knowing my Gladiator is protected, especially in extreme heat and rugged terrain. Definitely worth the investment—I’ll be sticking with AMSOIL from here on out.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil on the Market
    By  SHAWN,  a  Verified Buyer  on  February 09, 2026
    I’ve used this oil for over a decade. It’s kept 2003 Toyota running at peak performance.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Better Protection
    By  JON,  a  Verified Buyer  from  Boise  on  February 08, 2026
    At the recommendation of my mechanic I recently switched from 5w-20 to 5w-30 in my 2012 Honda Accord. The first thing I noticed was the engine sounded much quieter both at idle and while driving. I had recently noticed that the 5w-20 was being consumed at around one quart per 3500 miles. While not high consumption, I’m hoping to slow it down. Expect to push this car passed 400k miles.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Oil
    By  EDUARDO,  a  Verified Buyer  from  Los Angeles  on  February 08, 2026
    I’ve been running AMSOIL in my car and changing it every 5k miles. The engine runs smoother and quieter, and the car just feels better overall. Even at 5k, the oil still looks good and does its job. Definitely worth it if you want your engine running great and well protected.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    great oil
    By  STEVE,  a  Verified Buyer  from  california  on  February 07, 2026
    I looked at reviews for manu oils and filters. I decided that Amsoil was the best option. My car was new when I put amsoil in it.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Performs like they say.
    By  ROGER,  a  Verified Buyer  from  Kansas  on  February 07, 2026
    I have been using Signature oil for at least 10 years now and have never had an issue. And the added mileage between changes makes it more affordable than conventional. I have even emailed a couple questions, once about their marine 2 cycle oil and they respond quickly and positively.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    5w30 synthetic
    By  BRYAN,  a  Verified Buyer  from  Hawaii  on  February 07, 2026
    Very good oil it smoothed out my engine and made it quiter ,I can feel how much better the engine runs. 2017 2ss camaro v 8 engine.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great product
    By  DEAN,  a  Verified Buyer  on  February 07, 2026
    Oil kit is real sweet with the gloves and funnel made it real easy to change the oil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The Best Oil!
    By  SCOTT,  a  Verified Buyer  on  February 06, 2026
    Yes, IMHO, Amsoil 5w-30 Full Synthetic is the best oil out there. Won’t run anything else. Might be a little on the expensive side, but so is a rebuilt engine😂. Seriously though, it’s great oil!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil ever. Been using them since I was 16.
    By  GEORGE,  a  Verified Buyer  from  New York   on  February 06, 2026
    This oil is literally the best oil ever. My Toyota now has 430,815 miles on it and still going strong. I love amsoil will never in my life use any other brand I even run it in my lawn mower and dirt bikes. Keep up the great work and excellent top tier oil products. Thank you guys. I’ve been using amsoil for over 20 years now.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Review of 5W-30 100% synthetic oil
    By  ZENON,  a  Verified Buyer  from  Depue, Illinois   on  February 05, 2026
    Best synthetic oil. Keeps motor running strong.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Review of OW-20 100% synthetic oil
    By  ZENON,  a  Verified Buyer  from  Depue, Illinois   on  February 05, 2026
    Highly recommend. Great product at a great price.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amazing Synthetic
    By  TRAVIS,  a  Verified Buyer  from  Virginia   on  February 05, 2026
    Love Amsoil and their products!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Lub just fine
    By  JEAN MARC,  a  Verified Buyer  from  Deseronto   on  February 05, 2026
    Just got a brand new engine replacement on a 3.3 v6 Hyundai Santa fee and ask them if I could bring or told them that I wanted Amsoil signature serie synthetic and they said they would put synthetic but only what is recommended wich was either Shell or quacker state so as soon I got out the dealer after 21 miles drop it and put this in I like to protect my investment thanks Amsoil
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The Best products ever
    By  MOISES,  a  Verified Buyer  from  Pennsylvania   on  February 05, 2026
    Have many years using this Oils and I wouldn’t trade it for another brand.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent oii
    By  GERMAINE,  a  Verified Buyer  from  Illinois   on  February 04, 2026
    Didn’t believe in it until I tried it for myself and noticed the difference performance in my car 🙌🙌🙌💯💯💯💯
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil
    By  JACKY,  a  Verified Buyer  from  Louisiana   on  February 04, 2026
    The best oil on the market I feel; tested and compared to other top names it always comes out on top !
    Bottom Line
    Yes, I would recommend this to a friend.
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