Engine oil AMSOIL or OEM Subaru
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.
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.
Dominator is a excellent oil
Dominator is great in saws. The only issue is that I'm small saws especially, and at thicker ratios, like more oil than 40:1, some bike oils will not burn completely and will gum up mufflers, screens, piston tops. Mostly high performance racing oils.
Amsoil Z-rod. You need zddp or you can kiss your cam lobes good-bye.
My '15 Forester will burn a quart of oil every 1000 miles if I run 0w20.
I switched to 5w30 and it's all good for 5000 miles
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