I recently changed my oil to Mobil 1 5w30. i am in the So Cal area and was told the hot weather is very dangerous with this oil. I have been flammed for doing such and want to know what should i change to. i have an 07 wrx completely stock.
Also from what i was told if i keep it under 4k rpms this oil will hold up ok. Please chime in opinions.
what oil should i change to? what brand and what XXW XX?