Customer Ratings & Reviews

Terrific product.

Great oil

Best lube on the market

I tried the Purple stuff after my break-in period on my new Jeep SRT noticed the cold start tic, wasn’t every time but often enough. Did some research and found Amsoil and haven’t looked back. My local dealer recently moved out of state so now I’m buying direct. I don’t run it the full 25k, somewhere around 15-20K and still no cold start tick.

I have been using this oil for over 10 years and it keeps the internal parts of my engine clean and it performs well. No oil burning and no leaks. Highly recommend.

After making the switch from Mobile 1 and then later Royal Purple let me tell you, my sports car runs so much better. I can tell the difference in throttle response, there's less vibration, and my car sounds better too.

have used only this oil in my vehicles for 20 years. my old ford escort had 400,000 miles on it when i sold it and still ran great.

Been usin Amsoil on all my vehicles but recently switched to Amsoil on my 2019 Type R. Currently tracking the Type R with Ow-20 signature series noticed no issues with the oil. Thanks Amsoil!

I had my engine opened up at 341k to replace the water pump. It looked like a brand new engine inside, no gunk or carbon deposits anywhere to be found. My mechanic couldn't believe it. I love and believe in Amsoil's products; and wouldn't drive a vehicle without them protecting my investment.

I believe this oil to be the best,it is proven and I don't believe it can be beaten .Pure synthetic oil is the way to go these days and amsoil signature series is the oil you should use if you want protection.

Very easy cold start Rev smooth

I have 5 vehicles none of them drove over 15000 a year so now I just change oil once a year in all of them in December and it comes out cheaper than using conventional motor oil and not as much work

I've used this on my highly modified SRT-8 for 8 years. Great oil.

I put this in my wifes car and noticed a big difference in mileage and power.Best oil on earth.

I have not used it yet. My purchase was a preemptive strike. I bought a new car for my wife and when its interval comes up I want AMS OIL in it.

Best oil I've ever used. Truly great product that keeps my supercharged heel srt8 running smooth

Overall a good oil. Time will tell and I'm sure it will be in amsoils favor like every other product they manufacture.