Customer Ratings & Reviews

Very good oil

I switched my 2011 f150 3.5 ecoboost over to the 5W-30 signature series oil about a year ago. I’ve been absolutely impressed with the results. I have gained 2 mpg and the engine idles better and I no longer have the hesitation I had before. Excellent product.

I ran machine bearing wear tests on all every popular brand of engine oil, including Amsoil, with 0w-20 spec; Amsoil completely dominated ALL its major competitors, leaving almost no visible sign of scarring on its 3 test bearings under approx. 10 lbs of load pressure for 3-5 minute durations. Every single other brand had a much noticeable scar. Amsoil’s bearing was also the only one I could hold in my hand without burning my skin. I’m HIGHLY impressed!

The only oil I use!

Other companies have followed Amsoil providing full synthetic. I have used Amsoil for 30 years in every vehicle. Never had an engine problem.

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