Customer Ratings & Reviews

I have been a mechanic for 40 years. I have done a lot of research on motor oil. I have always been skeptical of claims made by oil companies and additive manufacturers. I swear my vehicles run better while using Amsoil and I see an improvement in fuel economy. I couldn’t believe Amsoil would make a difference in how my vehicles ran and thought it was all in my mind. I did an oil change on my wife’s truck and didn’t realize that I didn’t have enough Amsoil to complete the oil change. I had another brand of oil and used it instead. I didn’t tell my wife what had happened but she told me her truck was not running the same. I did another oil change as soon as I replenished my stock of Amsoil and she immediately noticed the difference. Her truck is an F150 5 litre that now has 420000km on it and has never been apart. It has the original timing chains and cam phasers. I think that speaks volumes about my choice of oil. Amsoil’s service is second to none as well. My orders are almost always delivered next day. This review isn’t just for the 5w30 signature series oil. I run the 5w20 in the 5 litre F150 and 5w30 in my Ecoboost. I use the 0w16 in my daughter’s Toyota Camry also. I also run Amsoil in my 3 motorcycles and ATVs. I highly recommend Amsoil products.

This is the best! I will use this from now on

I recently purchased a new to me 1999 SLP Firehawk and this oil was recommended to use. Pricing was great and shipping was fast. Great oil and great service.

Runs like new again

Amsoil technologies have been the benchmark that is driving the other brands to step up. Simply said....Amsoil performs. It is tested and proven to perform better than all others. I trust and use Amsoil in all of my vehicles.

Fast delivery service. Top of the line oil for My Hemi. Have used Amsoil in every engine I have since 2002 from Harley's to lawnmowers to Hemi's, also so far I've NEVER had the Hemi tick and I credit it to Amsoil...

I never thought in my life how much a quality motor oil can make a huge difference to my car. I have used Mobil 1, Castrol, Supertech, Kirkland, which all of them did the minimal job its supposed to do, keep my car operating and no sludge. However, the moment I used Amsoil Signature Series, my car has not only been getting benefits of protection but my engine has been revitalized where it feels lile it has no friction. My mpg has drastically improved by 10+ mpg. I have now learned the difference between 100% synthetic and full synthetic. Despite the upfront cost, it is actually a free motor oil compared to buying any other brand. I have saved more money through gas mileage that it makes up more than enough for my car. This oil exemplifies the saying of being cheap is more expensive. Better to buy the best oil and save more in the long run than buying a cheap oil that will cost you more down the line through gas mileage and possibly engine wear.

My two Honda vehicles love this oil! Runs smooth, and engines seem more efficient as my fuel mpg is now (25.0 mpg). 2024 Honda Ridgeline. My wife’s 2022 Honda CRV turbo runs incredibly smooth, and is getting 36.0 mpg. This is the only oil going in our engines.

A friend recommended this for my Toyota tundra. He said it made his engine quieter. I changed to this oil and immediately on start up my engine was noticeably quieter and better protection.

Been using Amsoil Signature Series 0W-20 for Years. When I bought my 2020 Toyota Tacoma new , been using Amsoil Signature every oil change once a year. The weather here in Nevada, in summer it Hot! Hot! Hot! In winter it Cold! Cold! Cold! This oil is outstanding!!!

Run amsoil in everything, 5w-30 goes in a 97 Avalon with 375k miles. Amsoil increased mpg avg by almost 3, this was switching from mobile 1.

Currently loving the oil, but have yet to fix oil conception in a GDI engine. Oil dilution is still a part of my life, but I have noticed some improvement. I do wanna try the restore and protect oil from Vavoline, see if it can help, and then switch back to Amsoil.

0W-30 Signature oil really protects, cleans, resists gumming, foaming. My SUV starts quickly even in the most severe cold temperatures yet holds full proper oil pressure at extreme heat. Top quality and MORE than worth every penny per ounce!

I would recommend this oil for everyone, this is the only oil I put in either of my vehicles.

The only product I use. Since 1994

Best engine oil ever 👌, will always use this product

My 2022 Elantra N has been using this series since day one and I have used other brands on my other vehicles but none for me has done better then Amsoil across the board.

Used 6.5 quarts of 0w20 in my 2025 Land Cruiser, it’s been very smooth so far.

I had a local shop put "synthetic oil" in from a giant barrel. I changed it a mere 1000 miles later with AMSoil and the moment I started the motor it purred... much smoother than mystery oils.

Quick shipping, received fast.