My truck is using 4 quarts of oil in between oil change what can be wrong? on 2005 GMC Sierra 1500

No oil stains anywhere and no smoke when i turn it on so, what can be wrong?

by in Mission, TX on November 25, 2012
2 answers 4 comments
ANSWER by on November 25, 2012
Possibly burning oil? Is there blue smoke in your exhaust?
COMMENT by on November 25, 2012
No. No smoke and it doesn't leave any puddles on the floor... I already took it to a couple of mechanics and they only did a visual but told me the same.... that it wasn't leaking nor anything... thanks.
ANSWER by on November 25, 2012
on higher mileage veh gm says 1/2 qt per 1k miles is ok,how often do you do oil changes. i would rec at least every 3k miles
COMMENT by on November 25, 2012
I've taken it to the shop to get the oil change... but two months ago I did the oil change and Two weeks later I noticed a knocking sound so I checked the oil level and it was really low. So I added a quart and till this day its been 4 or 5 quarts that i have put in it. But to answer u ? Yes ido the oil chang 3k
COMMENT by on November 26, 2012
i rec you have some testing done by your mech to determine problem,this is excessive.
COMMENT by on November 26, 2012
I will do that. Thanx