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My mileage has inched up slowly, from about 12 to slightly better than 14. Most of my driving has been city. It's really no worse than what I got on my Silverado Z71 w/5.3 engine. I've had this truck for 2 months now.
Would synthetic oil really improve the gas mileage? I've got a 96 Z28 that has only run synthetic, but I've never even bothered checking the gas mileage on it!
Crew Cab LE 4x4
Off Road, Tow pkg
Deep Water Blue
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