let's be reasonable gentlemen/women,
it is just an automobile we are talking about.
driving hwy, should only dictate the OCI and not the type of oil.
if you are driving like my MIL, 2 miles to the MALL and 1.5 to the YMCA, then we need to either put in a gold plated, platinum enriched, kryptonite suspended... you get the idea...
remember reading somewhere that the most wear happens on startup, how about mixing 2-cycle oil with your gas, like I do for my rx-7s?
pls set aside emotions, and save your money to send your kids or my kids to a better college.
if you search this board you will many members that, always did their OIL Changes with the OIL on sale and cheapest filter around. and their ride lated 250k miles plus.
i think moving parts are SUPPOSED to wear, so as long as they donot wear too much, we should be fine.
any reasonable brand of oil with the manufacturers recommended OCI you should be fine.
if are going to extend the OCI to some crazy miles like 15k 25k, well then start reading, do your search, ask your neighbor, or my MIL.
some cars do use OIL to cool, like my RXs, they come with factory oil coolers and it is used to do most of the cooling of the engine.
as long as I have oil pressure, the oil will cool the engine, (barring sludge)
must confess, I do use M1 on my wife honda accord 00 v6, I am going for 8k to 10k OCIs,
and my wife's 06 sienna, cuz em engines are known to be sluge monsters.
FYI: on the accord I am switching to Supertech after this oil change, and I will take sample for blackstone before putting in supertech synthetic. (driven nearly all hwy, 600 miles/week plus)