Engine oil VALVOLINE or AMSOIL

I run valvoline in everything I own wether it’s diesel or gas. I used to use Rotella for my truck and pensoil for everything else, but valvoline seems to make it all run better and smoother

I like Amsoil. A lot of guys swear by Shell Rotella T6.

I have never used anything but Amsoil in my LB7 Duramax for 12 years. It has almost 350,000 miles on it. I use Amsoil in everything from the weedeater right on up to the Duramax. Never one issue, and I only change it about every 20,000 miles.

I run Valvoline blue and love it. Run it in my IDI and my 454 Burb

I keep using AMSoil after seeing a test results sheet from Blackstone (i think thats the labs name) for my 6.0. Tested after 15k miles and was better than 400 mile motorcraft.

For the last 17 years I've run the recommended Valvoline Blue in all of my Cummins and so far the internals have been spotless when looking inside.

Amsoil Signature Series is all I have ever used, I will recommend it.

My preferred is Amsoil 10w30, the good stuff. Seem to burn less of it off when driving hard.

'03 GX470, had 240K miles when I bought it just over a year ago. Now on my 2nd oil change at 245K miles with Valvoline High Mileage 5W-30 full synthetic and Fram XG3600 filter. It's quiet and doesn't burn or leak oil.

I run Amsoil small engine oil in my 2000 inverter.