My brother in law has a new duramax and when he changed the oil for the 1st time he noticed that he put in 2 1/2 more quarts of oil then he took out. Anyone got a theory as to where the oil went. He also looked for any leaks and found none.
I had the dealership do my break-in oil change at about 800 miles, so I don't know the outcome of that. I waited for the "change oil light" to come on and gave up on it and changed my oil at 6500 miles. Added about half a quart one time in that 6000 miles and I checked it every couple weeks. Seems I put in about as much as what came out when I changed it.
That reminds me, I need to check it...it's been about 3000 miles. Gotta love new trucks!
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