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> As a general rule (very very general) it is much more efficient to use
> coolant to warm up the oil and to cool off the oil, not air.....air is
> actually a less efficient way to cool of the oil (by a long shot), you need
> a much bigger surface (note the size of an air to oil cooler) as you would
> need if you were to accomplish the same temp. drop via coolant cooling.
> Avi

Hmmm, my point was really that in the end the heat (when cooling) still
has to be exchanged with the air, so why not do it directly?  I guess
the air/water interface gives a more stable oil temp.?

Huw Powell


82 Audi Coupe; 85 Coupe GT