Customer Ratings & Reviews

Best oil on the market

You get what you pay for, use it in everything I own.

I use Amsoil lubes in all my vehicles. They are the best. But, at $10/at compared to competitive brands @ $5-6/ at, such as Mobile 1 and Valvoline Syntech, I'm not sure it's the best value.

I use amsoil signature series in everything I own!!

I've been using Amsoil in all my vehicles for more than 20 years and experienced smoother & quieter running engines (once oil was changed to Amsoil) and first hand visual experience how clean it keeps the engine after 180,000 miles the valvetrain was unbelievably clean (valve cover gasket replacement). There was absolutely no sign of tarnish whatsoever. It appeared as clean as it would have with 100 miles. If I didn't see it with my own eyes I would have said that's BS. Great Stuff! However; what concerns me is the oil comparison tests such as the current Viscosity Breakdown Signature Series has conventional oil in the test. I feel that's not a fair comparison. Let's compare synthetics with synthetics Incl. popular brands. Schaffer really???

My Tacoma loves Amsoil! Engine, Differentials, and Transfer case all run with Amsoil.

It’s my first oil change with Amsoil, will know more after a few

The signature series 5W30 from Amsoil is the go to product for me in a stock LS engine configuration. I Run a stock LS3 in my C5 corvette and I push the engine very hard in various racing events. I trust Amsoil over and other product at any point between oil changes. There is never a time when I am concerned about the engine protection that this oil provides.

Order arrived very quickly. I also received a handful of stickers. Small thing I know, but really makes the difference.

AmsOil is the best oil on the market hands down. Even my wife notices the deference when we started running it in her car.

I highly recommend Amsoil for everyday use. Best choice I have ever made.

I have been using AMSOIL products since 1982, and I recently placed this in my 2020 Honda 2.0 liter Accord. As usual, it is performing perfectly. I know from the extensive testing I have seen, done by AMSOIL, it is protecting the engine well, even if quick acceleration is required leaving our neighborhood when the engine is cold. The vehicle has far better fuel efficiency because of it, averaging 26 MPG in suburban conditions, and 36 in long-distance driving at 65 to 70 mph.

Easy Winter cold starting!

Have purchased this for my 2017 Mustang GT 3 years running. I don't see a major breakdown in the oil.