Quote:
Originally Posted by richardb
Good point! I actually do remove the oil cap during most changes, definitely on our other cars. For some reason I just went straight for the drain this time around. I also think letting some air in via the oil cap being removed helps drain the oil faster. Not sure if it actually does or not though.
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I haven't noticed that much on 5 quart or so motors but when I change the oil on my diesels and I'm draining 5 to 10 gallons of oil I can tell a difference if the oil cap is off or not
So yes it does make it drain faster.