how's your fuel mileage?

[Zero10]

30's.... highway or city?
I found I was nowhere near 30mpg city, even in my old N/A, but on the highway it should top 30mpg.

I just drove my 951 from Calgary to Vernon. it's a 680km drive with speed limits varied from 80 to 110km/h. I didn't drive with a light foot either. Tons of WOT and passing. All of that considered I also got a record 34mpg I actually filled it until fuel spilled from the filler neck because I didn't believe it.

[callmethewander]

My '87 NA gets a very consistent 25.4-24.7, i calculate the milage on every tank of gas. Most of my drive is highway with about 8 miles of my daily 70 mile commute being city miles. I've tried to increase the mpg's by driving more conservatively but didn't feel that the savings were worth sacrificing the enjoyment i get from more spirited driving, The difference was only about 3-4 mpg's. I've never gotten over 30 mpg, but that would be nice, also i have new plugs, air filter and o2 sensor and the car is running great, so i guess the milage is where it should be.

[callmethewander]

o, and my S2, i have no idea, i only use that to run around and have fun. i will make it a point to check tho

[Ken99287]

i just drove from philly to ny and back, driving mostly between 85 and 90 mph, i only averaged a measly 20mpg, suck!! lots of fun though! but all the damn potholes - poor porsche.

[callmethewander]

you only 20 mpg in a 924?!? haha you better slow down a bit before you outrun your wallet. i can dig the fun part tho

[Ken99287]

callmethewander, no, not 924 - 924S

[EMBPilot]

no bs. i picked up this car, and granted i was afraid to drive it over 58 MPH cause i had a really bad experiance with a 924 during a long haul drive, so i was going super easy on it... but at 58, the car got 36 MPG!!! i was shocked. in fact, i could have just about made it from MI to NJ on one tank! if only my badder could have held out!

the car ran great for 15 hours

[Ken99287]

gotta be illegal to keep a porsche under 60mph...

[EMBPilot]

LOL i really felt bad! 18 wheelers where zipping by like i was standing still. my knees were shakey until i could get the car within pushing distance of the house, then i finally got to step on it :-D

i dont give the car enough credit, it runs as great as it looks..... so far... but.... im always waiting for a shoe to drop

[Ken99287]

what happenned to your old one?? is the 58mph one a 924 or 924S?

[callmethewander]

wow pilot, that car's beautiful! how many miles on it?

[EMBPilot]

168K! paint is about 5 years old, kept the factory color. thanks!

[AaronM]

Originally posted by Porsche944
Oops! I forgot to mention that the MPG gage uses a signal that is proportional to injector duty cycle. The longer the injectors are open, the lower the indicated MPG.

More than that.

It receives a signal from the FI brain to tell it the injector duty cycle (from which it can compute the precise amount of fuel delivered assuming a stock fuel pressure regulator) and it also receives a signal from a hall-effect sensor in the speedo (on the early cars) or from the speedo sender (later cars). At speeds above 5mph (I think this is the threshold speed, I'm not sure) the mpg guage reads miles per gallon. Below the threshold speed, it reads in gallons per hour (there is a grey scale that shows gph markings).

The usual cause for a mpg guage malfunction is corrosion on the terminals to it from the speed sensor causing it to read in gallons per hour all the time or the typical guage grounding issue that can cause the same symptom; no reading from the speedo so no trigger to change to reading mpg and not gph.

[Tervuren]

Originally posted by Ken99287
gotta be illegal to keep a porsche under 60mph...

I got up to 70MPH to test my speedometer yesterday when takign my 944 in for timing belt and waterpump. I'd figured out the RPM for 70, wanted to see what the speedometer said. At the right RPM, it was 82MPH indicated for 70 real speed. Almsot all of my driving is on 30MPH, 35MPH, 40MPH, and 45MPH roads. Very rarely do I get teh fun of a 55MPH road, and I almost never visit the interstate system. (70MPH on either side of Charlotte, 55MPH in charlote).

In my '85, I also got about 35MPG on 55MPH country roads, frequently using passing zones on the cars that drive 40-45MPH reguardless of the speed limit. I made a lot of fun passes, realy enjoyed the roads.

[944 boy]

My best is 29 and avg is low 20's highway. You also have to remember some cars have the shorter 5th. At 80mph my car turns 4K. My friends 85.5 did 110 at 4K. That discrepancy in RPMs causes a huge loss of MPG.

[Tervuren]

My '86 had a '89 transaxel installed a few years ago, so I've got the shorter 5th. Its realy nice for me, as I can run 35MPH in 5th so long as I'm not accellerating. As thats where I spend a lot of time driving, works great for me. I rarely drive on the insterstate, but it does make the car fairly loud at speed compared to what I'm used to. I want to get a second car for more peace and quiet when I'm doing interstate driving.

[The Chief]

I've been tracking fuel usage for the past year in Gretchen, and have come up with 29.4 mpg, under varying conditions (a mix of highway and city driving, as well as several "wild" drives out of the sight of our local constabulary).

[hpaulb]

What is the average miles per tank. My 924S doesn't have the gauge. The old engine only got 270 miles per tank and I havn't run a full tank through the new engine.

[Tervuren]

Originally posted by hpaulb
What is the average miles per tank. My 924S doesn't have the gauge. The old engine only got 270 miles per tank and I havn't run a full tank through the new engine.

In my '85, I filled up around 250-300. Most was on one long trip, about 450.

[nynor]

i just got back from bend, oregon. i put 1500 miles on my car, round trip. it got 25-26 MPG, mostly at around 80 MPH.