With motor oil its hard to say based on experience unless you take your engine apart and check the wear and tear. Although this is my first time using AMSOIL I did my homework. YouTube has some very good reporting on wear and tear of all types of oil I decided on AMSOIL for my 2019 F350 Dually, oil and gear lube, and my 2000 Miata. I know already I made the right decision based on my research.

I have been using Amsoil now for about 2yrs straight. I started using this motor oil with my F150 V8, and also use the Amsoil 20micron filter. So far so good. I have seen the oil retain its viscosity better during my regular oil change frequency as compared Motorola oil I was originally using. As a result, I have become an Amsoil convert. Am still sticking to the traditional Ford oil change frequency that is estimated by the truck's onboard computer , for the simple reason that oil is relatively cheap when compared to the price of a failed engine. :-) Last, from the information I have read I do think that Amsoil will help extend the life of my engine (currently at approximately 140,000mi).

Excellent product. I use it in my 2018 Honda Ridgeline

Muy buena empresa y excelente producto 100% recomendado

Free shipping, but if you order the wrong thing you have to pay to ship it back. $20.

Been using for a while. Very happy and I like not having to be so conscious of oil changes. Even if I am a little tardy I know my engine is well lubricated

Excellent oil been using it for years

If you have done any research y’all know that this is the best product on the market, bar none. I have been using this product for nearly 30 years. No issues ever. It use to be expensive, not any more. It should be more expensive this is best lubricant period.

Works great in my high mileage cars. Great product

Best oil product ever made. Provides better protection compared to the competition now days. Doesn’t even come close to it. I would highly recommend people to use this or the signature series. That’s if you do your own oil changes. Not many shops will let you bring in your own oil.

I bought this oil for my daughter's car. It's perfect for her application as she mostly drives on the highway to her job. It fits within her mileage driven per year. Performs great!

I’ve never been gentle on my vehicles. I expect the best out of them, and to keep them running on top shape, I keep them on a steady schedule of premium fluids, and AMSOIL keeps the internals safe from my spirited thrashings. You guys keep sending the oil, I’ll keep sending it to the limiter, thanks AMSOIL!

Nothing but quality.

I use Amsoil in all my vehicles. Motors, transmission, and axles. Thier products work great every time.

Love ams oil I use it in my jeeps my duramax and my daily driver

2007 GMC Envoy 5.3 liter. 168000 miles. Removed engine for broken valve spring. Upon tear down the engine looked amazing. No varnish, home scratches visible on cylinders. Replaced timing chain and did a AFM Delete. Now have 186000 miles with 0 oil issues.

Use this on my personal vehicle all the time. Works great, however I change it every 3-4000 miles

Fine product

Been using it for years never any problems just keeps my engines running smooth.

Awesome product would change for anything