Wonky mileage change
- Thread starter benenglish
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I'm a bit of a leadfoot when the green light comes on but, no, the driving wasn't much different from normal. Nor was the mileage. That engine in that truck just sucks gas. It always has. Not quite 10 mpg, usually 12 or 13 but, yeah, it's a gas hog.
My '99 Suburban big block gets 10 MPG. This is whether towing, doing 80, driving easy or driving like a bat out of hell. This is terrible for a daily driver but tremendous for towing! Trailer weight/size dosen't matter. 10 MPG.
190 miles of exactly the same sort of driving as the previous 170 miles - 14 mpg.
I'm about to give up. The inconsistency drives me nuts but the truck runs well and does everything I need so maybe I should just let go of the notion of ever understanding why the mileage is so all over the place.
I'm about to give up. The inconsistency drives me nuts but the truck runs well and does everything I need so maybe I should just let go of the notion of ever understanding why the mileage is so all over the place.
How big a factor is this, really? For example, my tires are supposed to be at 35psi. Suppose I aired them down to 20psi. How much mileage change should I expect?
IDK.
I gained 3 mpg from a front end alignment on a Tahoe once.
Rolling resistance is real.
i had a 96 Chevy 2500 that got and extra 3 mpg and much better performance when the temp was between 40 and 50 degrees, as long as the humidity was low. It had to do with the tuning of the throttle body.
That had to do with density altitude. Different temperatures In combination with altitude creates denser air. Denser air equals more power. Simple calc, ask any pilot.
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What's not to like. Drive over the edge and you get 32.174 ft/sec [squared].
Your 0 to 60 time would be 2.5 seconds in almost anything without too much aerodynamic drag.
Every half ton pickup I've had has gotten in the ballpark of 16mpg (unladen) regardless of engine size. That's just the amount of fuel needed to drive a vehicle of that shape and size. Might as well go for the bigger engine for when you need it.
Head wind, and side wind all have a heavy effect on pickups. Try running into the wind with a 4X8 sheet of plywood. A side wind messes with your rear vortex, causing additional drag. Add this to the mechanical and frictional rolling resistance. Most passenger cars are shaped like a lump to reduce the effect.
My dad has that ecoboost V6 in his truck, it doesn't seem underpowered, I haven't pulled a trailer though. But even in that heavy truck it was way more nimble than my 63 chevy. Which got about 12 LOL.
But put that ecoboost in a car and it kicks ass. And it still gets between 18 and 22.
But put that ecoboost in a car and it kicks ass. And it still gets between 18 and 22.
Last 4 fill-ups of at least a half tank have been 12, 9, 12, and 13 mpg. All of it was the same kind of around-town driving.
I can't explain the inconsistency but I've learned to live with it.
I can't explain the inconsistency but I've learned to live with it.
300 miles around town at 15 mpg.
Absolutely no difference that I can figure between this tank and the ones where I get mileage in the single digits.
The inconsistency bugs the crap outta me but, as I said, I'll just live with it.
Absolutely no difference that I can figure between this tank and the ones where I get mileage in the single digits.
The inconsistency bugs the crap outta me but, as I said, I'll just live with it.
