The Ultimate Guide to Hot and Cold Engine Oil Checks

I have always been taught to check the oil level when the engine is at its normal running temp. Always change the oil warm as well. I found this: Oil expands 0.7% for every 5ºC that it heats up. So the difference between checking at 20ºC and 90ºC is 9.8%. In an engine with 4 ... You should check engine oil level when warm-just after switching off. Particularly important if you have an apollo tank(air oil separator) or a dry sumped ... It's best to check it cold. That way the oil has a chance to drain back into the sump and you a more accurate reading. If you check cold you run into the chance of getting false low readings due to oil getting past the check valve and draining into the crank case. Is this normal for most of CLKs? Many people check oil level in the early morning, but I've also seen other experts recommend bringing engine to ... We've always told people to check the oil level first thing in the morning, when the engine is cold. Ray: The main reason for this is that when ... Owner's manual says to check at operating temp, 1 min after shutting the engine off. So yeah, your warm measurement is the one you should go off ... Most of us know that with the red dipstick you are supposed to check your oil when it is hot, and with the yellow dipstick you check the oil ... We've always told people to check the oil level first thing in the morning when the engine is cold.