best LQ4 gas mileage upgrads

[TR65]

Them

I have been driving LS motors since the first ones in Vettes. My current 6.2LS3 gets an honest 21-22 mpg driving back and forth to work.

My 6.0 LS2 in my 65 C10 gets an honest 16-17 driving the same route. The difference seems to be aerodynamics. The truck has twice the frontal area and twice the drag coefficient I believe.

The key to good mileage with the big LS motors is to get the RPMs down. They have plenty of torque to run very low RPMs cruising. Both of these vehicles run 1800 rpm at 70 mph in high gear.

TR

[jayssunm]

Originally Posted by TR65

Them

I have been driving LS motors since the first ones in Vettes. My current 6.2LS3 gets an honest 21-22 mpg driving back and forth to work.

My 6.0 LS2 in my 65 C10 gets an honest 16-17 driving the same route. The difference seems to be aerodynamics. The truck has twice the frontal area and twice the drag coefficient I believe.

The key to good mileage with the big LS motors is to get the RPMs down. They have plenty of torque to run very low RPMs cruising. Both of these vehicles run 1800 rpm at 70 mph in high gear.

TR

My dream MPG! Going to pull my 67 out of storage and start working on it in 2013 after I find a new job. More pleasant to drive is #1 on my list. Gas mileage falls into this list. Not sure an LS motor is in my budget, but the 6 mpg I currently get isn't either!