So I have owned and operated a lawn service company since 1986. 2 years ago I had a machine with a 35 horsepower Kohler engine. And the governor gear on the engine broke. And we were probably 200 yards from the truck. And when this gear broke the RPMs went through the roof. Got the machine to the mechanic. And he said usually an engine will blow pretty quick when this happens. But not with this Amsoil 20w50. The engine held together. And we're still using the machine.

The higher zinc content is good for my C4 Corvette ZR-1.

this oil is the best for my dune buggy with the tropical Florida temperatures.. a modified Volkswagon Beetle engine at 2291cc, the zinc does a great job and the engine doesn't heat up… the best oil in the world

This works grate.in the motors and Trany's.

I started using AMS OIL back in 1996. I began using this oil in my race bikes. No street bikes. These are fully built 16,000rpm race bikes. Daytona, Moroso, Homestead and N. Jennings. I never once lost an engine in a entire decade. Now I still use AMS OIL in my 600hp Turbo Honda Civic. I mean this kindly. Dont be cheap. Use the best

My truck was burning oil with the recommended 0w-20 oil that gmc said to use. Now I’m using the 10w-40 from amsoil and my truck doesn’t burn oil anymore

Excellent quality oil. AMSOIL the best. Engine working smooth,quiet.

Allways quick delivery and as good as it gets for quality products!

Use this oil in both of my old Hot Rods.

Was recommended amsoil for my Hayabusa's sticking clutch (after winter storage) & so far, so good. I haven't stored the bike yet w/oil but transitions seem smoother! Little pricey tho

Just put it in my Silverado. We’ll see how it performs.

Great engine oil, highly recommended and will buy again for my surface drive engine.

Great high zinc oil for my jeep. Runs quieter and better for my engine.

Been using this for many years in older air cooled flat tappet Porsche engines. Does well on the track and retains good test sample numbers for surprisingly long drain intervals.

Never have a problem receiving my order. The best oil I have ever used. It is All my Vehicles from the 401 Ford 5-40 diesel to the 10-40 400 ford and my LTD 460. I use the 5-30 in my 5.4 Expedition. In my Hondas 10-40 and Harleys,v twin 20-50 they run much cooler which to me means Much less friction. My V twin cam went from 38 mpg to over 45 and at times 50 mpg. That is unheard of on a Electraglide ultra 96 CID twin cam. But, that is what it got on a road trip. Yes, much less friction.

I would use their filter if they made a two qt for a Chevy V8 8.1 L in my RV (NAPA Gold 1794)

So far things are running great, this is the first time using the oil, definitely won't be the last!

I have been using this product in the 5.7 Liter Engine of my 2002 Crownline 225 boat for well over a decade. The boat stays on a lift so always exposed to a high moisture environment. I take pride in how great my 20 year old boat looks. With Amsoil, it runs as good as it looks!

This oil by far is the best oil for a performance standpoint.

I've used Amsoil products 1998 and never had a failure due an Amsoil product. Owned gas and diesel engines, motorcycles, Motor Homes, generators, trucks and passenger vehicles and always had confidence in Amsoil.