On average, what's the difference in degrees Fahrenheit between coolant temperature and oil temperature when they are at operating temp?
At the same temperature? With all politeness, I suggest you think again.quote:
Originally posted by Blue636:
Probably to maintain viscosity.quote:
Originally posted by Tree Hugger:
With the exception of the Passat above all the oil temps seem to be below the coolant temps.
So what is the 'summer weight oil' justification again?
This has been my question for quite a while now. I've never seen it answered...quote:
Originally posted by Tree Hugger:
At the same temperature? With all politeness, I suggest you think again.quote:
Originally posted by Blue636:
Probably to maintain viscosity.quote:
Originally posted by Tree Hugger:
With the exception of the Passat above all the oil temps seem to be below the coolant temps.
So what is the 'summer weight oil' justification again?
1996 Corvete LT-4 that I have had since last November. Driving under various conditions in Northern California, oil temperature runs 10 to 15F higher than the coolant temp once t6hings have stabilized. The car does not have an oil cooler.quote:
Originally posted by Tree Hugger:
Thank you, at last one hard data point!
Probably to maintain viscosity.quote:
Originally posted by Tree Hugger:
With the exception of the Passat above all the oil temps seem to be below the coolant temps.
So what is the 'summer weight oil' justification again?
Well, there it is. The last half of these posts show that oil temperatures can exceed the coolant temps, and I'm not surprised. I think the oil has a much larger capacity for heat than any coolant solution and would naturally get hotter, especially in 90 degree weather with stop and go traffic.quote:
Originally posted by Tree Hugger:
At the same temperature? With all politeness, I suggest you think again.quote:
Originally posted by Blue636:
Probably to maintain viscosity.quote:
Originally posted by Tree Hugger:
With the exception of the Passat above all the oil temps seem to be below the coolant temps.
So what is the 'summer weight oil' justification again?
Well, there it isn't, actually.quote:
Originally posted by Blue636:
Well, there it is. The last half of these posts show that oil temperatures can exceed the coolant temps, and I'm not surprised. I think the oil has a much larger capacity for heat than any coolant solution and would naturally get hotter, especially in 90 degree weather with stop and go traffic.quote:
Originally posted by Tree Hugger:
At the same temperature? With all politeness, I suggest you think again.quote:
Originally posted by Blue636:
Probably to maintain viscosity.quote:
Originally posted by Tree Hugger:
With the exception of the Passat above all the oil temps seem to be below the coolant temps.
So what is the 'summer weight oil' justification again?