Customer Ratings & Reviews

Used signature 10-30 synthetic in my 2002 sequoia and drove almost 15,000 miles before changing the oil and filter. I sent a sample of the waste oil to a lab for analysis. The oil was good, still usable, with no traces of problems.

I've been using Amsoil for almost 20 years, my 1999 GMC Yukon Denali, 219,000 miles, and 2008 Mitsubishi Outlander SE, 221,000 miles using 0w30 Signature Series and both still going strong, and now a 2016 GMC Canyon Diesel truck using the 5w30 European Formula, Highly Reliable Product in my book.

Have been using Amsoil everywhere possible, don't have to ask twice.

Motor run smoother get better gas mileage and change the oil less Oil still looks great when it comes out

I switched from conventional oils and filters back in 2012 and its been the best decision I've made concerning lubricants.

The third party tests only depict the facts. But I have many years and many vehicles that only used Amsoil. I appreciate that Amsoil offers OEM and other options. That's awesome. But I've always gone with the Signature Series oils. I keep things as simple as I can. I don't want anything but the best, and I don't want to have to second guess engine protection. A full year (repeated years, one is a 13 yo Focus I bought new), that has never been more than a half a quart below full at its annual oil change. ??? Why scrimp on protection when I'm saving money and producing much less recycle oil, AND the car runs awesome after all these years?

I have used this since the first oil change in my car that I bought new in 2016. Newer vehicles call for a 0W-20 oil. With that thinner weight oil I am concerned about wear protection. Looking at independent test lab results of Amsoil 0W-20 oil I see that it does better than other oils and passes the tests with ease. My car also has variable valve timing which can be vulnerable to sludge buildup. A clean synthetic oil is a must and the Amsoil additive package fights sludge better than others. We get easier cold weather starts and slightly better mpg too. Spendy but good.

I believe that Amsoil is the best motor oil that you can buy.

Keeps my Subaru DIT engine running smooth. I wouldn't put anything else into a turbo charged engine.

I use Amsoil in all of my vehicles. I have found it saves fuel and makes my engines run much smoother and cooler. I have proved the use to many friends with my Harley's showing them how ell they perform also.

Oil seems to work very well . This is the second oil change with it - so we'll see how it goes from here

Great product

I really have enjoyed the switch to synthetic, I was super pumped to open up my kit in the mail.

Just turned 120,000 miles and the engine is very quiet and runs like new.

Bar none, Amziol products are the absolute best you can buy! For everything you own, farm, lawn and garden , cars, trucks

I used Amsoil Signature for the first time in my wife's Elantra and it runs much smoother at idle than it did with Mobile 1.

Excellent engine protection with the long term performance provided by Amsoil. Consistently better mileage than any other lubrication product. Would recommend to anyone wanting the absolute best in engine protection and lubrication.

My go to oil for 05 and 10 Impala. Used Amsoil since buying the cars with approx 60,000 km on each. 40,000 km oil changes within 12 months with a filter change at around the 20K km mark. I had 345K on the 10 Impala when the transmission gave out - motor was strong. The 05 is still running well with over 395K kms. Has to have something to do with good quality oil.

I only use Amsoil. Wouldn't waste my time, money or vehicles on anything else.

I have used this for a few years now and has provided the best protection out of all the oils out there for me.