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You should...

  • start your engine and see what happens lol

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  • talk to someone about your cars extended warranty (this a joke)

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Personally speaking I think people get a little too up tight about this sort of stuff. Checking the dipstick too often will give you erratic readings because they are never quite the same at any one time. The dipstick is a crude method of measurement because that's all that needs to happen, and as long as the level is between the min and max marks that's all you need to know.

If however you want to get as exacting and consistent as possible, then check in the morning before you start. All the oil has drained down from the top of the motor (or at least as much as possible). The reading SHOULD be pretty high on the dipstick given most of it is now in the sump as opposed to the upper end of the motor.

The dipstick needs to be removed, wiped and reinserted and then read for a proper measurement. Even at idle the oil is being splashed like crazy all over on the inside (by design) including the dipstick and up into the lower end of the dipstick tube. Indeed the entire reasoning behind a proper oil height is so that the crankshaft can slam down into the oil in the sump as it turns and splash the oil up into the lower end of the cylinders where it can be picked up and controlled by the oil rings on the pistons. For that reason the reading is inaccurate without a wipe and reinsert first.

I personally check the oil (roughly) once a week.
 
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