More Miles per Gallon (400 miles per tank)!!!!

[TerminatorX5]

lol... i still have my phone bills from Bell of Pennsylvania since 1991... i don't need them and should get rid of them... they just take up the space and prove nothing... lol...

my calculations are incidental - since i needed to justify the leasing vs buying, i did those calculations, and the numbers came relatively satisfying...

however, cost per mile in fuel alone is not in X5's favor - the E90 was $0.16 a mile and the 4.8iS averages at $0.22 per mile in fuel, considerably more expensive proposition...

[bcredliner]

Originally Posted by motordavid

My back of the envelope suggests closer to 50 Cts a mile for many cars, esp of the X's ilk, adding in initial depreciation, longer term/lower rate of continued depreciation, insurance, maintenance costs, some repairs, et al.

Not apples to apples, but our '01, coming up on it's 12th birthday, and 88k+ miles, shows 20.6 on the OBC, (only reset a couple times over those 12 years), which is close/slightly under what I get on trips, and more than what I get around town or shorter trips, by the arith method at fill up time.

I feel one has to add in/factor in the other 'running costs', to get closer to a cost per mile...but I still feel that cars like the X are closer to 40-50 Cts per mile overall.
Cars are expensive to buy, own, and operate, though still a wonderful method of trans.
GL, mD

the dash read out is as close as we need to do a comparison. There are so many variables on any one vehicle from tank to tank it is a waste of time an effort to try to be more detailed.(addressing his previous post).

IRS sets cost per mile that are deductible annually--got to be conservative, wouldn't you think? Corporations use that annual set amount---got to be conservative wouldn't you think. That cost per mile is not set on X5s of any year--it would be higher if it were. Deductible cost per mile has been around $.50 for several years and about $.55 for the last few. I am not challenging Term's calculations as his is a very unique case.

Comparing OBC readouts, especially cost per mile is still meaningless. There are far to many variables from post to post to draw any conclusion other than--

Not saying this isn't interesting.

Though, IMO, if mileage averages are going to be within the same time zone of a mini-trend consideration, each post should start with the year, current odometer reading, the engine, the transmission, exhaust, city/state, wheels, tires, engine or transmission mods and how they normally drive. Use the readout as that is the only constant among all of us, and post the current average and +/-average over 5000 miles of driving that is as close to normal daily driving from reported location. Using these parameters we can pick out the ones that are the closest match and see how we compare.

DISCLAIMER,I would never even imply these are the absolute of parameters that could be used to establish an always inaccurate mini-trend. I suspect if this post is considered at all, we will know spend our time disagreeing with these parameters or posting we have to add more. That's OK--

That said, I have:

Year---2002
Odometer--109,000
Engine 4.6--stage 4 Dinan Mods and a 150 shot of nitrous now and then
Trans-- automatic--Dinan mod
Exhaust--Dinan-Low restriction
Location---Dallas, TX
Tires--continental extreme contact
Wheels--stock 87s
How driven--as fast and hard as I can get away with.
Readout---Current--13.9 MPG, Lowest I recall--12.9 Highest 19.3
Average--Average over 5000 miles 14.5--16.9