Oiliy froth under engine oil fill cap?
Just a noob :>) I'm looking to buy a used 325i 2.5L 02 or better so I've been doing a lot of test drives. I've noticed on all of the cars that I've driven a creamy light tan'ish froth under the oil fill cap, I pulled the dip stick oil levels looked fine no froth, is this normal. Normally this is a very bad thing? I'm a mechanic by trade just not on auto's for many years. I do all my own repairs.
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