What MPG do you get in your 951?

[MarkRobinson]

I average about 20mpg in the city driving like a grandma (gas is $4/gallon here for 93), running consistently on a 10-gallon refill to keep the car light. No spare tire or tools to weigh me down, but do have 285mm rear, 245mm front tires.

On the highway this last weekend, I did 600 miles @ 21mpg average, 65-70mph, lots of hills, full car (600lbs of people, gas, luggage, dogs)

In the city, with just me or me & the misses in the car, I average about 20 in granny-mode.

My car has rebuild injectors, 928 pump, Vitesse chips with an adjustable FPR running 30psi fuel pressure (no, I don't get on boost at all with it 8psi low)< but found a semi lean & clean 15.5:1 at cruise which is about as lean as I can go w/o feeling the reduction in fuel.

I ran 31psi down there for 20mpg, 30psi back for 22mpg, but it's bordering on way too lean & of course, I don't dare get on boost like that.

Just curious to see what others are getting.

[billy mild]

I get 23 mixed highway/city 50/50 mix. Straight highway doing 80 MPH I got 28 MPG.

With the turbo mill in these cars you can get 28 mpg. That was just me and a passenger plus our bags oh and no A/C cause mine is broke.

[MarkRobinson]

Interesting. I tried 10 gallons a month ago with one gear higher: ie, always between 2700-3300rpm, both city & highway: my MPG dipped down to about 19. I was thinking that since engines are more efficient, maybe the efficiency over-rides the extra fuel needed to sustain the higher RPM, but appears to be invalid.

Normally, I'm low RPM & high vacuum.

[944 Ecology]

On a California to New York trip, 25 mpg highway at 75 mph. Moderately loaded, no passenger.

[UncleRay]

Mileage on trips with city and highway average in the high 20's to 30 mpg. There is more info in this thread...951 fuel mileage?

[Pete R]

I did my first track day the other day. I went 70 miles and used pretty much the whole tank. It's probably in the 6-7mpg range. that's probably not the info you were looking for though

[derekc23]

I've been getting mid 20's on the highway but it's been a long time since I've driven it long distance much less around town until this past week after it sat in the garage all winter.

[tyro]

~23MPG in mixed city driving.

On a trip to Road America a couple of years ago I managed 32MPG, once there and on the track..6MPG.

[zedsn]

Generally 15 mpg city and 20 to 25 mpg highway but depends on how heavy my foot gets.

[MarkRobinson]

At times I can smell fuel, but is always fuel-vapor free under the hood & yes I've changed out my hoses. Wonder if I have a leak out back???

[968 GUY]

I replaced the cam tower gasket recently, was getting just below 20mpg before, now I have
driven it only 90 mi. or so and used half a tank. This car is all orig. equipment except for boost enhancer that I have set per instructions from Lindsey.
Nothing seems to be wrong, no excess gas smell, runs well, new plugs, wires, cap, injectors sent to witchhunter for cleaning etc.
Guess I need to do a bit more poking around.

[tyro]

Do you have a wideband? 14.7 air:fuel at idle and cruise?

If the oxygen sensor is out of order, the system goes rich.

[running_cold924]

consistent 26mpg...

[Dougs951]

22-28 depending on how I drive it.

Well that and the weather.

[89-944NA]

0, ZIP, NADA, NO MPG.....Car is sitting until I get 2 more project cars out of my garage. Then I'll have the time and space to freshen mine up. Actually, was getting about 27 highway, about 20 city.

[Lawrence Coppari]

I get 30-31 driving about a steady 65 mph with car fairly heavily loaded and TP at 37 psi. The best I get in town driving is 23+. On the track it gets 6-7 mpg. I have a k27, 3 bar fuel pressure, MAF. Three years ago my O2 sensor went bad and the highway mileage dropped to about 25. With a new O2 sensor, it popped back up to 31 ish. Fuel injectors have be professionally serviced.

[shavinseconds]

18 in the city. ..I definitely want to get more without driving like a snail. ..

[Lawrence Coppari]

My town driving is nothing like city driving. I don't think I'd get 23 in a 'real' city.

[MarkRobinson]

i just replaced my AFM with another Ohm'd good one: so we'll see how the next tank or to does.

[wild man]

The only way to get better fuel economy, is to run skinnier tires - but who wants to do that?