Sly Raskal

iTrader: (1)

Ok let me update my response because I didn't iterate it correctly,

I average 275-300 per 14 gallons. If i went even further, i'd probably be getting about 350-375 for the entire tanke.

My avg is about 19-20mpg and that's driving it aggressive.

I consider "one tank" to be how much gas is used before the gas light goes on and not what it takes to completely empty my tank. It's not good doing that anyways because of vapor lock.

Sly Raskal

iTrader: (1)

could be:

bad 02 sensor(s)?
very very very dirty air filter?
not keeping up with oil changes regularly?
tires not aligned, balanced, or air pressure checked?

there are a lot of factor's here but to be getting only 200 miles per however many gallons your filling up sounds really bad.

I read in your previous thread you dont drive slow, well i drive the same way, when there isnt' traffic i drive about 80 on the freeways here in so cal and i accelerate pretty fast off lights and on on-ramps but i'm still not getting anywhere near 200 miles per tank in my car. SO there is defeinetly something wrong here.

Sly Raskal

iTrader: (1)

I'm not a newb by any means! but i have to ask, what the heck is the IMRC?

is that the intake manifold resonance chamber?

a long time ago when i got my car the motor in the intake manifold that controls air flow broke and they warrantied it.

are you talking about that?

EricL

As I mentioned the experiences will vary depending on driver, machine, etc, etc.

You could even get a tire with a stickier compound that would give you better gas mileage, if the tire was lighter and the construction allowed less road loss through deformation. Tire rolling resistance is not only based on tread compound -- it also depends on the way the casing is made.

And, finally, most of the tests that ALL of us do are not being done on a test track with research petrol, one non-varying road surface, and with instrumentation to insure that all variables are controlled.

BTW, you must have some pretty "exotic" machinery to allow your vehicles to always produce 23-24 MPG. The statistical variation is better than any result I've ever heard about. You must follow the same route every day and have a lab to check your gas fractions.

BTWII, you must never accelerate -- but then how is that possible? -- and have managed to figure out how to violate one or more of the tenets of thermodynamics. You confirmed a loss in acceleration, but have declared that your mileage is unchanged at 0.0000000 MPG.

I think you should report to the magazines and talk to the EPA about city and highway mileage as you have some rather rare results.

As for what's going on with the car ... well, I think that all of the suggestions posted by various members re: tire pressure, IRMC, gas change, air filter, 02 sensor, etc, etc need to be looked into. And, the car doesn't have to be too rich to just burn too much gas. If the pumping losses go up, volumetric effeciency goes down, and/or frictional losses go up, the car will burn more fuel. Time for some diagnostics...

EricL

YES, that is it...


You lose about 20HP at max RPM when it isn't functioning...

revangel

Guys, thanks for all the info. I will look into the items you noted and I will indeed keep everyone posted.


Thanks,
--re

Joe5.0

EricL I'm not saying I didnt lose even .01mpg with the heavier wheels, but I am saying that the difference was not noticeable. Fr it to fall out of the bounds of normal variation it would have to be at least 2mpg difference that was immediately noticeable when the wheels were installed.

And actually for the past 4 years my drive has been pathetically repeatable. Working 6-7 days a week the same shift will do that.

And like I posted, I dont drive like a grandma. I just use cruise control whenever possible and shift into OD sooner rather than later.