Holy Tire Tech, Batman!
Some serious azz discussions on something as vague, and only a long term average, as 'mpg'... ;)

yeap!!!

that's us, the xoutposters!!!!:nanana:

my long term MPG is

16.80392 MPG

in 436 days of ownership (as of 8/21/13 latest available results) i have

used 1,773.039 gallons of premium fuel for the

cost of $6,692.34 driving the

distance of 29,794 miles with average

cost per mile of $0.22 and the average

miles per day at 68.80392 and

daily cost of driving at $15.35 a day...

:thumbup:

Gas prices have generally been rising over the years and often fluctuating.

What equation did you use for the rise and fall in gas prices?

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

Recent pics from a short trip couple weeks back of cluster and computer before adding AA headers. Crossed a mountain range. Just thought I'd share.... I will be doing a differential swap in a couple of months. If I can squeeze a few more MPG's from some 3.64 diffs on the highway, including my recent header upgrade, mid to upper 30's might be an easy task. And don't be fooled, my 3.0 is no slouch.

I use excel spreadsheet:

at fill-up i take the receipt, and write down the info from the receipt into the spreadsheet -

cost per gallon
miles at fill up
amount of gallons
total amount paid

after several fill ups a calculation is possible... therefore i know exactly how much my MPG is at each entry, can compute the total amounts of fuel, days, dollars, averages... The average cost per gallon came to $3.77, even though I had filled up for $4.30 a gallon and for 3.49...

I do not have the cost of operating the X, as the X is still in operation...

We had leased a 2011 335i xDrive Mpackage...

in 232 days we had it, the cost of operating that car came to $0.16 a mile in fuel cost, for 14,535 miles driven, and $0.46 cents a mile in amortization cost, and the grand total is $0.63 a mile including fuel, insurance, lease payments... a disclaimer, the car was returned with 3300 miles UNDER allocation for which there was NO refund, so the amount could have been a penny or two less, should all the miles be used up...
the daily cost for the car was $39.37 including the insurance, the fuel, the costs associated with lease - about the same as rental car of small size...

Term,
Good analysis, and I find your overall cost per mile, to be in the zip code I expected...
Still cheaper/much easier for us, than flying, on most trips. And, convenient.

Cars ain't cheap, esp for the few of us that are Retired Bums, here. :D
GL, mD

Just saw this...That is some serious econobox you got there :thumbup: Were you driving on fumes on that tank? The best that I have ever gotten out of the X's entire life was 465 miles using approx. 23 gallons - hauling a$$ up interstate 5 (from LA to SAC).

FYI...I do see that I can potentially get 26mpg on the computer when I do the instantaneous reset while cruising at 55mph or 60mph. The problem is that I don't have the patient to cruise at that speed :(

dkl,
It was a run from our mtn joint to south Joisey: 660 mile trip, 10 1/2 hrs, filled up just up the road from departure, and slid into Jersey on fumes. Late Octoberish, and no A/C on most of the trip. Usual haul azz/dodging revenue cops speeds however.

Oh, and had the OE Turzanas on that came with the 132s I copped from a fellow poster here. The current replacement Diamaris will not give that kind of distance, ever, for our X.
Hope you are doing well!
BR, mD

:explode:And I thought I was OCD about keeping records. This makes me feel totally inadequate and severely under qualified to claim even one letter in motorhead. :explode: Although, your calculations are for a very small category of all 335i s in 2011.

I find it interesting by not applicable to X5 E53s.