Engine oil AMSOIL or Motorcraft

Any major brand of the correct rating and viscosity will work.

That being said, I have an 05 that was used as a DD for 12 years. Short trips, 3 days a week. After 12 years and 47K miles, I added a aftermarket supercharger. Put another 20K on it, including trips to the drag strip and track days.

I then had it rebuilt with forged internals because I wanted higher boost and more power. When the engine was pulled apart and measured. There was no wear. The cylinders were still within factory specs as was the crank.

I had used Amsoil SS 0W-20 the whole time.

Amsoil in everything I ever owned. My 2017 RAV4 hybrid is sitting on 350k miles and still running strong.

I run amsoil in the engine and primary and redline in the tranny. No issues, my glide runs better on the amsoil then when I the syn3 in it

Here I am just dumping in Amsoil 5W-50 SSO because all I care about is shear wear protection and something content with high temp operation. 20,000 miles and not even a single psi drop in compression the whole time, don't even premix.

I've been using AMSoil 5W30 in my WRX since it was new (2003). Turbo is still good, and head gaskets lasted 17 years. I think it's worth the price.

I use Amsoil 0W20 but I’m a dealer. I have access to the test they run comparing it to Mobil and AC Delco stuff. The Amsoil is supposed to be better longer, but to me that comes down to your filter more than your oil.

Amsoil allegedly is the best. I use it in everything and no issues so far.

I’m using Motorcraft 5W-20 Synthetic Blend in all my Panthers with 2500 mile change interval and no issues.

Amsoil is top tier oil and you can't go wrong with it.

I’m using Amsoil 0w-30 and am very pleased with it. Getting about 1 mpg better gas mileage and had the Amsoil lab analyzed after 3500 miles and numbers are better than what the factory oil showed. All added up, the Amsoil was better at protecting the engine.