Customer Ratings & Reviews

I HAVE BEEN USING AMSOIL FOR OVER 20 YEARS ON ALL BOTH OF MY VEHICLES. I HAVE ALWAYS USED THE EXTENDED OIL FILTER SINCEL IT HAS BEEN AVAILABLE. I USE THE SAME OIL CHANGE PEOPLE EACH YEAR. THEY ARE ALWAYS SURPRISED THAT THE OIL IS NOT GRITTY OR THAT IT DID NOT BREAKDOWN . I WILL BE A LIFETIME PREFERRED CUSTOMER OF AMSOIL FOR LIFE.

Whether it's my daily commuter or my weekend toy, I use AMSOIL to protect my vehicle's moving parts and keep it on the road.

Good stuff

O put this oil 5w20 in a 2010 Ford Expedition,in march and it still looks clean great oil pressure,this is August??

I have been using this product from the beginning with my truck. I believe as a result I have not had any major engine trouble or turbo issues even after putting many miles on now

Love this oil. Been using it since the truck was new at 20 miles. Now have 233,000 on it and absolutely no problems with the engine. Oil changes have varied between 10,000 and 18,000 miles. :)

We use this oil in our Ford Fusion. We only put the best of oils in our vehicles and Amsoil makes an amazing product.

I've been an Amsoil Preferred Customer for many years. Have used most all of the Amsoil lubricants and other products at one time or another. Have never been disappointed. Love the way Amsoil continuously improves its products, including this Amsoil Signature motor oil. Try it. You'll be pleased, too!

I have been using Amsoil products for 25 years, and is very satisfied with everything.

The best of the best work here and produce the best of the best products. I would pursue and career here if made possible.

Engine has over 300,000 miles, absolutely no deposits inside as revealed by boroscope, change frequency is 12,000 to 15, 000 miles, 700 hours, this oil is simply the best

I have used Amsoil products on both my motorcycle (2012 Victory Cross Country Tour) and car (2007 Dodge Magnum SXT) for many years, after the initial NEW break-in of their engines. This is an excellent product that I would recommend all to use.

Use Amsoil in all of our vehicles including the tractor! We have a 08 Cobslt with 265k Mike son it and still runs like a top!

I've had great results with Amsoil both on track and on the street. Love them.

In all my vehicles

Used it 4 years but it seems 2 seep through gaskets after years if use. No sludge build up 2 keep it from leaking out?????????

Better than advertised, trustworthy, reliable products.

Great product, I have been an avid user of Amsoil for more than 20 years now.

I have used amsoil products in all the vechile i purschase over the years including my motor home some of the vechicles were diesel some were gas. i used it in them all.

I began using Amsoil back in the 80's after reading their claims vs conventional oil. After some years, I transitioned to one nationaly recognised synthetic I could buy at a big box store...it was about the same cost, a little more convenient, and I reasoned, probably good enough. In the process of time, I bought a 94 Miata. After some work, it ran well, nearly 30 mpg, but the lifters were noisey. To quite the lifters, I took each one apart, cleaned them, and reassembled all 24 of them with 10-40 high mileage oil of that one brand of synthetic. Much to my surprise, the lifters were now much worse. I immediately changed the oil to that same one brand, but 0-30. This made the lifters quieter, like they were before I cleaned them. On a lark, I decided to try Amsoil 5-30 in the Miata. I could not believe the difference! I had done all that work, but all I needed to do was pour in a higher quality oil. The idle was now smooth and quiet; so much so that when I sold the car to another Miata enthusiat (advertising the smooth and quite engine at 185,000 miles), all they did before paying my asking price was open the hood to see the engine idling. Amsoil. I've seen it make a diffdrence.