Originally Posted By: unDummy
Someone look up SAE J300 for me. Take a look at the visc requirements for 40, 50, and 60.
Makes me wonder if the thick oil is a band-aid for inadequate oil cooling, psi, or sump size.
BTW, excellent UOA for a young engine.
Imagine the fuel dilution if driven equivalently in a cooler climate up north, eh?
Noone remembers the AEHass thin oil papers?
Whats the sump size and factory recommended OCI here?
AEHass doesn't track his cars. That's a significant piece of information. While driving around with 5w20 in a car spec'd for 5w50 might work fine most of the time, you take that car on the road course and all bets are off.
In regard to the band-aide, thing, you are not the first to suggest that, so it may have some substance to it.