- Jul 26, 2000
- Reaction score
I've seen 13's to 14's on a couple of tanks so far on mine but it required so much discipline to drive at or below 65 mph and not stomp on the loud pedal it wasn't fun. If I reasonably restrain my right foot I'm typically getting low 12's for mpg. It can be 8-9 if I'm driving it like a pissed off teenager though.When I had it running a year ago it was about 13.5 commuting. For 75 miles empty last week it was more like 14. The real question is what it will see with a camper. Needs some MAF tuning, too.
In my big trip thread (https://ck5.com/forums/threads/how-warm-should-my-engine-get.330868/page-3), I got 9.5MPG average over a few thousand miles with the LQ4. I never really got much over 15.5 without really careful use. Something about deep gears and tiny tires in a heavy SUV prevents good mileage with any gasser. Maybe I'm an optimist, but it seems like a giant, non-down-shifting engine can get better mileage in some towing situations than a medium-sized gear-hunter. Even if that's a wash, the trip will be more enjoyable. (Hence this thread )
Yeah but until you try bigger you don't realize.Towing with a 5.3, or even 6.0, sucks.
CASE Learn: To use the CASE learn function please follow these steps:
1.Ensure the engine is at normal operating temperature (ECT > 170F).
2.Put the vehicle into park (auto) or neutral (manual).
3.Turn off all accessories and A/C.
4.Turn the vehicle off.
5.Apply the parking brake.
6.Press the brake pedal. Keep the brake pedal depressed during the entire procedure. REQUIRED for successful test completion
* Manuals: Use right foot to depress right-hand side of the brake pedal, so when you release the clutch after starting the engine, your left foot can take over on the left side of the brake pedal without releasing the brake pedal.
7.Start the vehicle and let it idle.
* There is not a Begin button. Ignore this.
* Click the Crank Relearn button, do not click okay yet.
* I waited only a couple of seconds between clicking Crank Relearn and beginning to rev the engine
9.Gradually rev the vehicle to fuel cutoff (around 4000-5000 RPM's) over a period of about 4 seconds. When fuel cuts out, immediately release the throttle.
10.Allow the engine to come back to an idle.
* Now press the Okay button
11.Turn the ignition off for at least 15 seconds. This step is required for the VCM to store the newly learned configuration.
Yeah, makes sense for low stock and high modified (induce fear in EcoBoost drivers?)On my '12 Silverado the stock fuel cutoff in P/N is about 3500 rpm. I raised it to 6k because racecar.