Quote:
Originally Posted by v40bart
I'm sorry Daim but you must have been sleeping during your physics lessons. Water is a lot denser then oil and has the highest specific heat of all fluids meaning that it takes more energy to raise it's temperature by one degree then it takes to heat the same amount of oil. The proof of density difference is in oil floating on top of water. The only difference is the areas of the engine that those fluids contact and their boiling point. oil heats up quicker but withstands higher temperatures and has better lubricating qualities.
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Then I missed that lesson.
Oil still takes longer in an engine to heat up, as it doesn't sit around the piston sleeves. If you look at where oil is in an engine and where the oil sits, they are miles from each other. The lower half of an engine (there, where the oil is located) sits below the "water line" (water is pumped mainly only around the cylinders and in the cylinder head). We all also know, that heat raises
The oil below is, as said, pumped through the engine and doesn't get the same amount of heat compared to the water...
Thrus oil will also "sit a while" in the sump until it is sucked into the system. Water is constantly pumped around and through out the engine.
If you have never driven a car with a water and oil gauge (in °C! Not just a scale saying "Cold-Warm-Hot") you'll not understand...