Quote:
Originally Posted by UnhappySwede
I drove 50 000 kilometers over a year but I still try to do this now and then. I shifted down to the 6th gear on a nightly highway cruise, driving some 90 miles per hour on high Engine revs. What happend was that Engine oil temperature dropped almost to 40C. Wtf?
I geared up and drove it more gently, temperature rose up again, I shifted down and it got colder again when it should actually become hotter. I did the procedure a third time and then the Engine temperature needle stayed at 12 o Clock, regardless of gear and speed.
So my thermostat lives a life on it's own too. Sometimes I have to drive it really hard for 30 miles to even get the temperature up, and now that same behaviour cased it to drop instead.
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well higher revs doesnt doesnt necessarily make the engine hotter. the engine needs a load on it to get hotter.
and diesels by nature run cooler. i have a duramax diesel truck and it takes a half hour of driving to get some heat out of the thing, below freezing. lol