Here's the deal... lots of folks here discuss using a heavier oil in the summertime for "extra protection," especially with the advent of all the 5-20 specs. I don't quite understand... here's why:
Unless removed, all cars have the thermostat that regulates flow to the radiator. Except for the old 57 chevy I used to work on, every car I've owned reaches operating temp and then stays there, with no gauge indication of winter/summer differences. (The old chevy actually fluctuated with speed, rpm, etc.)
Granted, the sump will get some air cooling benefit, but unless it's finned, not enuf to be a significant contribution.
So, if the cooling system isn't overtaxed, and the gauge stays put, so internal temps are, say, within a 15F range year around, does a thicker oil make sense?
Mike!!
Unless removed, all cars have the thermostat that regulates flow to the radiator. Except for the old 57 chevy I used to work on, every car I've owned reaches operating temp and then stays there, with no gauge indication of winter/summer differences. (The old chevy actually fluctuated with speed, rpm, etc.)
Granted, the sump will get some air cooling benefit, but unless it's finned, not enuf to be a significant contribution.
So, if the cooling system isn't overtaxed, and the gauge stays put, so internal temps are, say, within a 15F range year around, does a thicker oil make sense?
Mike!!