Customer Ratings & Reviews

Look at any proper sheer test and this wins. The only oil I'll trust in my boosted built engines!

Had a slight tapping noise coming from my engine, after a oil change and new filter will AMSoil the sound was almost unheard, after a few hundred miles the engine is purring like a kitten : )

Best in the business

My Honda CRV runs great on this oil. My mileage has increase and it just runs smoother. I highly recommend this oil. The best in the business.

Have used this oil for 20 years along with EA filters on my vehicles.

Is there a better oil?? I think not

I love this product only the best !

Why because it is the best. Period! Amsoil is the best product company in the nation. Their staff are courteous knowledgeable and will research the items best for your vehicle upon your request so you would get the specific items.

11 out of 10

I would not hesitate to buy several cases of this my car runs great since I started using this don't hesitate to buy

Been using Amsoil since 1996

I have used 5w20 for many years in our f150 ford trucks and will continue for many years to come

This oil has always delivered the best protection for any engine. It keeps camshafts and other engine parts from ever having a metal to metal issue.

Best oils ever. Used for years.

This is the only non-dealer oil I can find that meets and exceeds the factory specs for my direct injected turbo gas Sorento. It has a guaranteed 25K life if you change the factory filters as per required and both my KIAs love it! So glad I found this as I have read of several turbo direct injected motors blowing up- even with a great warranty who needs that? Plus it is FULL synthetic not a blend which I will not use.

This is the best synthetic motor oil I've ever used. My 2007 Toyota Camry V6 sounded and felt smoother than before. That's what 100% synthetic Amsoil does for your vehicle. I will be putting Amsoil on my 2010 Lexus ES 350 as well. Amsoil on my vehicles only.

Its such a good product, it has done me good all these years i will be buying more in the years to come.

I use this in my racecar and it's the only oil I'll use.

Holds up very well for changing it out every 10,000 miles. No burn off like other oils.

I use to do a lot of driving . All my vehicles had 400,000 + miles on them including one Suburu with 505,000 only reason still not driving was not the engine but the rust eating the frame and body due to heavy salt used in winters .. .used the 25,000 oil change 10 -30 signature and 15,000 mi oil change filter . Changed oil and filter every 15,000 mi . Only added Extra half qt to qt at around 13,000 mi. Been a user since 1980's wouldn't use any other oil .