ks13 wrote:Oil takes forever to get hot, even when outside temps are up during daily cruising. People see water temps up and automatically asume their engine is warmed up and ready to be caned, I cringe. I usually have to drive my car for 30mins before I see a substantial increase in temp, even with the oil cooler covered with foil. Get a temp gauge and get a feel for it, If your not tracking the car a thermostat is a good idea.
Quoted for the truth of it.
As was stated it's possible to have the oil TOO cool as well, hence the purpose of the thermostat. Also, the oil NEEDS to get above approx 210°F to properly evaporate the moisture and contaminates out of it.