|
The oil weights I described are sort of mix and match on lots of cars.
Mobil 1 0w30 isn't up to the task of heat like its' 0w40 for example, but 0w30 Castrol would be.
Most of the specs come about with being TESTED in the car, and getting car company to LIKE your oil.
In other words, specs are more concerned with the chemistry of additives to stop acid corrosion, and sludge.
I used to sell oils for machinery, and from reading specs the engineers were not that good at picking the BEST oil, just something adequate ( maybe some planned obsolescence going on).
|