Best way to up MPG's?

[vegasblj]

Whats the first things you would add to a new '06 LLY to get a few more MPG's?

Will changing to tires to 265's help or hurt MPG's?

ben

[Heartbeat Hauler]

I think that driving style will help more than anything else. For example, watch ahead for traffic lights turning from green to yellow and let up earlier, same with stopped traffic, and no jackrabbit starts. Change all fluids to syn, engine, trans, & rear diff (xfer case if 4x4). If you want fuel mileage from tire selection then go with a tall narrow tire like a 235/85/16E and run 70 psi. I doubt you will see much difference with the 265/75/16 because of additional weight and rolling resistence. Next, take out every bit of extra weight, tools, jacks (not the stock jack), and any other junk. A larger exhaust MAY help, but not a bunch. That's my $.02 worth.
JP

[mark45678]

I agree 100% with ^ ! driving style is the biggest MPG killer. slow down on the highway to 65 ~70 and live with what you get ( you should get 16 ~ 18 mpg) on a 2500hd 4x4 with a crew cab.

[okeehandyman]

For better MPG just drive like you have an egg between your foot and the pedal and you don't want to clean the carpet!

[Kennedy]

All good comments.

[jcummins]

On a long drive (hunting trip western states), I'd drive burn off a tank, then my friend would do the same. He consistently got 1 mpg better fuel economy than me. We drove at very similiar speeds....seemingly. Throttle position and how you ease into it versus....my style. Some got it, some don't..I don't.

[SoTxPollock]

You want the best mileage just imagine an unboiled raw egg super glued to your shoe or boot on your right foot and to the accelerator petal. Mash it too quickly or pop your foot off too quickly--- raw egg mess on the floor mat.
I'll bet if you do that you will make as good mileage as your friend. An old trick from the Mobil Gas Economy Runs they used to hold back in the 50's & early 60's.
OPPS, dating myself.

[More Power]

To help improve fuel economy, I run the tires a little on the hard side. The new 265's I had installed on my 2001 GMC are rated for 80-psi. I run the front tires at about 70-psi, then air the rear tires to match the amount of squat.... about 60-psi. While towing, I air the rear to 70.

80-psi might be a little better from an efficiency standpoint, but the ride wouldn't be as good and there might be some wear issues while running unloaded (burn the centers out of the rear, etc.).

Jim

[Mark Rinker]

After all the above, reducing exhaust and intake restriction, will help but probably take many miles to pay back the cost of parts and installation.

However, both will net you MORE POWER which is usually considered a good thing...but then you want to put your foot in it...and...