this is important as the type of driving, along w/ speed, traffic congestion, city/highway driving and more can make a 40% difference.
Originally Posted by mmorgan1865
1996 Chevy 3500 crew cab Vortec 350 4.10 gears - 13 mpg Highway
2003 crew cab 1500 hd, 6.0, 33"tires, 20" rims - 11.5 mpg country roads/city (@35-55) - 16 highway (@60mph)
2000 Yukon 5.3L 4X4 Gets 17.5 at 55-60 mph Hi-way, 15.5 MPG at 70mph hi-way and 14.5mpg in city traffic. This is a stock vehicle
'88 Silverado C3500 2wd 5.7L converted to carb & HEI distributor, 700R4 .70 overdrive 4:11 gears (11.8 mpg combination city/secondary roads); (17-18 mpg freeway @65mph)
1998 Suburban 2wd 1/2 ton 5.7-215,000 miles.
City 14 mpg-pure city-I pulse and glide from stop to stop
Hy-21 mpg with CC set to about 63mph .
That makes me feel a lot more comfortabl about my gas mileage. I keep reading about other Duramaxes getting 20+ mpgs and have been wondering what's wrong with mine, lol.
Originally Posted by flylow
2003 Chevy 2500HD, 6.6L Diesel, stock, 285/75R/16D BFG:
No load on HWY @ 70 - 18.3 mpg
No load in City - 15.3 mpg
Mixed 70/30 (HWY/City) - 17 mpg
2004 Silverado 2500 (non HD) 6.0 4x4 crew cab shortbed
Stock w/CAI and exhaust 12.5 mpg (3.73 gears)
Lifted 35x12.5/16 Kumho AT's (4.10 gears) 12.5 mpg
New Tires Cooper Discoverer ST 35x12.5/16 (heavier and more aggressive than Kumhos) 11.2mpg (current setup)
This is mixed driving 80/20 (Hwy/City) light throttle, unloaded and normally 65mph on the highway
According to the onboard pc I am getting 15.3 mpg for mixed city/highway.
When I go on a 60 mile one way trip on the highway driving at 65 mph the pc says 20+ mpg. I am at 4200 foot elevation and drive to 7000 feet regularly in the CA sierra's so that is pretty good for being above sea level and in very mountainous terrain.
I drive with a light foot and coast often down hills, and I do long rolls to red lights, I am very easy on the brakes.
I am doing a manual calculation on the next fill up.
Oh yeah....2010 GMC Savana AWD 1500 with 5.3L, 3.73 gears. The vehicle has 7000 miles on it and no engine mods. Just 1" wider custom chrome wheels and BFG T/A KO's in stock siZe 245/70/17.
im confuse my chevy tahoe 2001 5.3l is 26gallons=280 miles