That’s damn good mileage. I was wondering if it was a 5 speed.Sorry, in my sig, 5.7, 700 R4
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That’s damn good mileage. I was wondering if it was a 5 speed.Sorry, in my sig, 5.7, 700 R4
Run stock size tires, drive normally and accelerate slowly. Take off crap in your car that’s not needed. I.E tire chains in summer. Tow chains for off road when yiure 98% on street.
If you have crap hanging off the truck off road lights winches roll bars and off road lights remove all that clean up the aerodynamics. If you removed the front airdam put it back on.
Keep tires aired up And make sure the alignment is good. Make sure brakes are adjusted right and not dragging.
smaller wheels or regearJust did a record today for 15.99 mpg just shy of 16 mpg mostly highway. Kept it at 60 mph everyone passing me was pretty upset but I'm usually in the slow lane anyways. I wonder if I change octane or go to 55 mph will I see improvement. And this is with big 26" wheels which equals out to 33" tires. Im pretty confident I can squeeze out more with the stock 16's. We should start a mpg weekly thread that be cool.
Your right it's really dangerous but the tractors creates less drag when your following makes our brick vehicles slightly more aero and efficient. I drive a tractor trailer everyday so I'm used to it. Everyone says I drive like a grandpa.Sitting in a Prius 5’ behind a tractor trailer’s just not my thing.
Just did a record today for 15.99 mpg just shy of 16 mpg mostly highway. Kept it at 60 mph everyone passing me was pretty upset but I'm usually in the slow lane anyways. I wonder if I change octane or go to 55 mph will I see improvement. And this is with big 26" wheels which equals out to 33" tires. Im pretty confident I can squeeze out more with the stock 16's. We should start a mpg weekly thread that be cool.
smaller wheels or regear
That's impressive and amazing good jobMy 99 Tahoe with a cammed L30 305, 4L60E, and 3.42s rolling on 32" tall P305/50R20s consistently managed 23 mpg highway rolling 75 mph. Cammed 8.1/4L80E dropped that to 19 mpg. The Express van has gotten over 21 on 93 octane pump gas and gets 17 on E85 on the highway. 383/4L85E and 3.73s with 30.5" tall P245/75R16s. I run the speed limit and do not roll much slower than 65 ever (lower posted limits) and usually 75-85.
Tuning helps alot on these engines. GM neutered them tuning them for 87 octane. 87 is a poor excuse for a fuel. The vortec heads make the most power around 30-33* BTDC timing advance and the stock GM timing map does not advance the timing more than about 23-25* BTDC at wide open throttle. The 195F thermostat operating temperature also drastically kills off timing. A 170F thermostat with a cooling system capable of keeping the engine under 180F is worth a bit of power and MPG as well. Keeping it cool helps you have a safety margin from detonation with the timing cranked up. Running cool on 91+ octane these engines like to run the MBT timing advance that GM already provided in the MBT timing table with big gains in torque and fuel efficiency.That's impressive and amazing good job