Vortec: Too much engine? (Mileage questions)
Hi, I'm getting dangerously close up upgrading my 1999 Yukon with a 5.3 engine to a 2007 Yukon XL with a 6.2 engine. I was test-driving it today and saw the display list an average MPG of 11.5. Yik...
Forum Discussion
APT wrote:
My 6.0L 3.73 gets 8mpg towing at 67-70mph, 14mpg in my wife's mixed around town driving, and as high as 18mpg non towing highway.
What's interesting about this mileage report is that its not too far off from my 5.3 with 3:73 gears. My wife's around town driving is about 14 also. I just got it so we haven't done enough dedicated hwy driving to know what that mileage would be.
The argument for smaller engines in trucks is often better mileage, but I've never been convinced that's true. We just sold a 2003 Trailblazer, much smaller than a 1/2 ton and it had an I6. Logic would make you think that it would get halfway decent mileage for a full framed mid-size SUV with that 6 cyl. engine. Its daily mileage wasn't any better than our PU. And only marginally better than our last Suburban.
A big part of this is driving style. Jack rabbit starts and driving at 80 on the freeway are what eats gas. The way I see many people driving the full size SUVs and PUs, they have no business complaining about poor mileage.
