| Re: [GMCnet] 455 Expected Engine Life [message #360455 is a reply to message #360451] |
Tue, 01 December 2020 21:15   |
Rick Staples
Messages: 126
Registered: May 2014
Location: Johnstown, Colorado, USA
Karma:
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Ken,
I agree with your reference. If I read the P30 manual correctly, a vehicle getting ~10mpg (as most of our GMCs do on a good day) might be expected to consume up to 1 quart of oil in 600 - 700 miles. That jibes with my recollections from way back in the early '70s. IIRC, most manufacturers would not consider warranty work for excessive oil consumption unless a car used MORE than a quart in 800 miles. Modern oils, especially synthetics, probably will improve that somewhat. Still, as I used to say to my customers, unless oil consumption ha significantly increased, you can buy a lot of oil for the price of an overhaul.
My 2ยข,
Rick Staples
Rick Staples, '75 Eleganza, Johnstown, CO
"Advice is a dangerous gift, even from the Wise to the Wise, and all paths may run ill." -Tolkien
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