Hello everybody, I am new to this forum.

I would like to know what is MPG for Suburban 2500 8.1 with 4x4 on highway with unload and load with weight???

Anybody have any best advice on how to add HP/TQ, improve MPG as well.

What do u recommend to buy chip for this truck?

What Octance do u recommend? 87 or 89/90 or 92?

I own 2002 Suburban 2500 LT 8100 4X4 with 3.73 ratio.

I would like find info spec for 8100 motor. A to Z please. I would like to learn more as much as I can about this motor.

I am not sure 8100 is called a 496 or 502? I was told by different people said 502 is 8.2 but other said 8.1 is 502???

 

Maybe 11mpg if lucky.

 

Supercharger would be the best way to add power w/o getting into the engine.

Use the octane recommended in the owner's manual.

Mobil 1 would help (marginally) power and mpg.