The truck I traded on my 2010 did use oil, to the point of a buy back in the difference of trade value to loan, It was a 2007 GMT-900 C/CSB LTZ 4 Speed Iron block 5.3. At 14500 miles oil light came on, they said 4qts low, at 17300 oil light on replaced lifters and some valley pan?, not a tech reading receipts, 19500 check engine light on, cat pluged on passenger side,didn't know there were two but thats what is says,22000 miles light on again,last straw,about a month later with me calling the dealer they offered the trade deal or they'd fix the motor, didn't trust the engine so I traded it. I loved that truck Ruby Red and fully loaded drove three hours through Ohio to get it, But it was my choice to trade it, and I want to say before some one jumps on it GM teated me VERY WELL.