Customer Ratings & Reviews

Best oil you can use. I have my oil tested every time I change it. Always tests great and I run it hard.

I’ve been using this oil since my Mazda CX-5 was brand new in 2024, changing it every 5,000–5,500 miles. Occasionally, to keep the interval even — for example, if I’m at 16,500 miles and it’s time for an oil change — I fully replace the oil and filter with Castrol Edge Extended Performance until I reach 20,000 miles, and then I switch back to Amsoil SS. During those few miles with other oils like Castrol or Pennzoil, the car starts making all sorts of noises from the engine bay, behaves strangely, and drives noticeably rougher, almost like something isn’t quite right. Some might think I’m exaggerating, but I drive my car more than 10 hours a day nonstop, and I know every detail and sound it makes. Once I switch back to Amsoil, the car feels brand new again — all the weird behavior goes away. Since then, I’ve been using Amsoil in my motorcycle and in my generators as well. My family recently bought new cars (0 miles), and we’ve already purchased their SS oils to protect them from day one.

I have used this oil in my 2022 RAM 2500 truck since it was new with no issues I now have 66,000 miles on it so the truck is driven daily. I would not use any other oil.

Super smooth, keeps my engine running smooth

I purchased the 0W-20 Signature Series and an Amsoil filter for our Toyota Sequoia, with the 5.7 V8. As most of the Toyota owners know, Toyotas are typically loud. After changing the oil, there is a noticeable difference in the noise from the engine. I've used Royal Purple HMX in our 2007 Toyota Highlander which has held up great, making noticeable changes to engine noise and cleaning the engine. I'm hoping Amsoil will do the same, but time will tell.

Looks good so far. Amsoil had the oil in the 0-W16 I needed. Received it in very short time after the order. The long game of mileage will tell more how the oil does. How many miles on the motor since new before any major issues in the engine. Time will tell.

Best oil ever

Only the best Synthetic Oil, Oil Filter for Dodge Durango

I use Amsoil oil and filters ( i wish they had a wider selection for the small engine oil) i find Amsoil products superior over the competitors products.

AmSoil is a quality oil and the fact that they ship it to my front door with in 2 days of ordering online is a bonus. They also offer an oil analysis which I use to monitor my supercharged mustangs engine running E85.

Made my first oil change in my 2024 Honda Ridgeline. I've used Amsoil for many years. When you want the best , forget the rest, Amsoil is the only choice.

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.