How's your fuel economy?

[RickFLM4]

Originally Posted by HighlyMedicated

Failing O2 sensor the CEL doesn't pop up?? The air filter is a good one I will keep an eye out if a drastic change! I just thought you would be able to feel the car a lot less healthy but it does take time for certain problems to be felt with so it does make sense. I just never had or plan to have a high mileage M to see such problems. Does fuel really go down that fast? 100 miles less than other fill ups?

Here's the graph for the S4. Couldn't figure out why MPGs dipped in middle of chart but car went into limp mode at the end of the dip period. No CEL or any other indication anything was wrong (and I was busy) so I ignored. Full disclosure - do not recall if it was an O2 sensor or another sensor that needed replacing - it was a while ago. However, once replaced you can see MPGs bump back up so I don't think it was a coincidence. If it saw that graph again and couldn't figure out what was going on, I'd probably bring it in sooner in the dip period.

[HighlyMedicated]

Was there a loss of power then? or ecu just giving more fuel thinking theres more air coming in? hmm thats a toughie, especially if limpmode only after a while, the problems does gradually happen so its hard to feel im guessin. Damn almost 16mph like me but also you got 27mph at one time...nice must be a long trip or no redlines ! lol

[RickFLM4]

Originally Posted by HighlyMedicated

Was there a loss of power then? or ecu just giving more fuel thinking theres more air coming in? hmm thats a toughie, especially if limpmode only after a while, the problems does gradually happen so its hard to feel im guessin. Damn almost 16mph like me but also you got 27mph at one time...nice must be a long trip or no redlines ! lol

No loss of acceleration or other driving symptoms before limp mode just came on all of a sudden in the S4 (on the highway of all places).

Yeah most driving is highway with some fun once in a while. Avg. 80(ish) mph for most of my driving but fairly steady RPMs for the most part. A lot of variability I see is due to time of day between trips. I drive to Miami often and in both the S4 and M4 it's 2 trips between fillups. If I travel during rush hours MPGs can drop by 10% - 20% vs. off peak time.

The other thing is sitting in drive thrus. I'd don't do it much any longer (for reasons other than fuel) but have noticed sitting in a drive thru with the car running uses a fair amount of gas.

[HighlyMedicated]

No loss huh, I will check out how my mpg does from now on! I drove thru miami to ft lauderdale and man, people there drive soooo slow!!!! I'm just used to LA driving I guess. Yea didn't realize how much gas is used at idle sucks I need AC on at all times! lol

thanks for info

[shahano]

tuned I get 8 mpg when I drive hard.

[jwar93]

If anyone is interested, just had a road trip in my ZCP 2017 F80. Total miles can be seen in the pic and that was about 170 to destination a few miles being a little kid on the way to day spot and then a 160 mile or so trip back home. Highway speeds averaged 65-79. MPG was about 30/31 on trip down. And no fuel stops either until I got about 3 miles from home!

[dmboone25]

^^^That's pretty damn good - I have never gotten more than ~200 miles in a single tank.

[jwar93]

Best part was on the way home. Started with 165 miles of range with a 154 mile trip, ended up with 80 miles of range when I go the gas station near my house.

[damageprone]

Originally Posted by jwar93

If anyone is interested, just had a road trip in my ZCP 2017 F80. Total miles can be seen in the pic and that was about 170 to destination a few miles being a little kid on the way to day spot and then a 160 mile or so trip back home. Highway speeds averaged 65-79. MPG was about 30/31 on trip down. And no fuel stops either until I got about 3 miles from home!

[Super Spartan]

My fuel economy is "I don't give a shit miles per gallon". Didn't buy an M4 to save on fuel.

[logicalunit]

Originally Posted by Snappy Phoenix

My fuel economy is "I don't give a shit miles per gallon". Didn't buy an M4 to save on fuel.

Well dang-didly, I've bought mine purely based on Jeremy Clarkson's consumer advice not to buy a Prius...

[///M4ster Yoda]

Originally Posted by Snappy Phoenix

My fuel economy is "I don't give a shit miles per gallon". Didn't buy an M4 to save on fuel.

Good one. Who gives a shit is right. I floor this bitch every chance I get

[dmboone25]

Originally Posted by logicalunit

Well dang-didly, I've bought mine purely based on Jeremy Clarkson's consumer advice not to buy a Prius...

Wasn't that the E90 though?

[michaelalex17]

Not good lol

[DEANMW]

17.5. Most days I only drive to work then home. It's about 3 miles each way, stop light to stop light.

My last long highway trip (with some mixed city driving) I was getting ~350 miles to the tank.

Not great, but honestly not far off from my 335i which the M3 replaced. I guess I have a heavy foot.

[Super Spartan]

Originally Posted by DEANMW

17.5. Most days I only drive to work then home. It's about 3 miles each way, stop light to stop light.

My last long highway trip (with some mixed city driving) I was getting ~350 miles to the tank.

Not great, but honestly not far off from my 335i which the M3 replaced. I guess I have a heavy foot.

I get like 220 miles per tank

[AJM1125]

About 20.5 MPG average

[suspicious lump]

I've been avg 11 mpg all city driving

[BoxKing]

I get roughly 260/gal. I push the car to the limit from start to finish. I didn't buy the car for gussling savings or for its road trip abilities. I also find it odd when owners find this model "stiff". Buy a Cadillac if you want a smooth ride.

I'm impressed when I do travel bc my mileage per tank is over 400.

[bonsta101]

Does NOT go above 23.5 mpg. If it does, you're not driving it right

[dmboone25]

Originally Posted by Snappy Phoenix

I get like 220 miles per tank

We are in the same range.

[DEANMW]

Originally Posted by Snappy Phoenix

I get like 220 miles per tank

Oh on this tank I got 202