best LQ4 gas mileage upgrads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**TR65** · 03-13-2011, 10:57 PM

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

03-13-2011, 10:57 PM	#3
TR65 Senior Member Join Date: Nov 2007 Location: Greenville, SC Posts: 873	Re: best LQ4 gas mileage upgrads 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 __________________ 1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880



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