Check oil with engine hot or cold?
Doesn't really matter. Either hot or cold is ok. Just make sure the engine is off and wait a minute or two after shutting off the engine before checking it. This allows the oil to drain back to the oil pan after the engine has been running. HTH. -Jim
Subaru actually claims the correct procedure is to wait only a couple of minutes. If you wait until it is cold then the oil level reads high. But that is Subaru.
I have always checked my oil cold, that way you exactly how much is in the oil pan after all the oil has drained back in to the pan. But if you have to check it warmed up wait at least 5 minutes before checking it.
Some cars take a very long time for the oil to run down, some only take a minute or two. You have to learn how your engine is in regards to oil levels. The good news is that oil level is not all that critical. If it is a half quart down it won't hurt anything.
Another important aspect of checking your oil is to have the vehicle on level ground.
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