Anyone have a resolution to the 2007 Suburbans oil consumption? on 2007 Chevrolet Suburban 1500

I also have a 2007 Chevy Suburban. It's been going through oil entirely too quickly and although I was 200 miles shy of the next scheduled oil change, it was down by a quart. This has happened numerous times and I was told to take it to the dealership this time. Has anyone gotten a viable reason for all this?

by in Picayune, MS on October 22, 2013
4 answers 2 comments
ANSWER by on October 23, 2013
If you are positive there are no oil leaks, try replacing the PCV valve. Seems like GM had a recall on the PCV years before that but it's a cheap part and if it sticks open, it will burn off oil vapor by drawing it into the intake and leave no evidence. A good valve will rattle freely when removed from the engine and shaken. Another test is to remove the vacuum hose from the valve while the engine is running and plug it with your finger. The rpm should drop by about 50 so just a slight drop in rpm with the PCV valve removed from the system. If there is no change in rpm, the valve is stuck closed. If the change in rpm is greater than 50, the valve is stuck open.
1 person likes thisFlag inappropiateReply
ANSWER by on October 23, 2013
Does it ever use/loose more than a Qt. between oil changes? How many miles do you drive between oil changes, 3,000 or more? It is 7 years old now! That's acceptable, no worries.
1 person likes thisFlag inappropiate
COMMENT by on October 24, 2013
It's usually down a quart and having to change oil/add at 2700ish miles.
ANSWER by on October 23, 2013
how many miles on trk? after a certain time GM allows 1/2 quart of oil burning per 1000 miles of driving. iv seen many that burn approx 1 to 1&1/2 per oil change based on 3k mile services
1 person likes thisFlag inappropiate
COMMENT by on October 24, 2013
Its got 65300 miles. Change oil every 3000 but have had to at 2500-2700 for the past 3 or 4 times. It's usually down a qt.
ANSWER by on October 23, 2013
According to dealer most of the 5.3L will lose 1/2 quart at 5,000 miles and if you wait till 7,000 it will be 1 quart. This info is from a lube tech from the dealership here, been doing same job for 7 years. Just info.
1 person likes thisFlag inappropiateReply