ImPrettySnazzy
Full Access Member
- Joined
- Apr 11, 2011
- Posts
- 157
- Reaction score
- 1
I'm lucky to get an average of 12mpg out of a tank
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Granted it's not a tahoe/yukon/burb but my '08 crew cab 5.3L on a recent 500+ mile trip averaged 19.3mpg with the AFM/V4 mode turned off. I was trying hard and had it up to 19.8 but then my wife drove and got in a hurry. But I imagine with the correct tuning plus synthetics and easy driving it would be possible for a tahoe to do that.
When I drive my 09 Suburban from NY to Florida, I average 20.5 MPG. Coming back home, I do 19... Every time.
I'm not positive, but I suspect that southern states may not oxygenate the gas like in the NY area, so I'm getting better mileage from their fuel.
But there's a helluva difference between a 5.3 and a 6.2. Especially since most of the 6.2's are AWD. Mine is a true 4X4 so obviously I run it in 2WD most of the time, but sucked the bejeezus out of gas when bone stock and new and did a little over 11 MPG. Now with 30K on the clock and a few mods, it still can't pull 20 MPG on anything but a downhill.