John_AZ

You could move to AZ where the gas tax is low and "winter gas blends" of ethanol do not decrease your mileage.



Ethanol info Consumers Reports:



From:
http://www.consumerreports.org/cro/2...bate/index.htm

My best mileage comes when controlling the right foot.

J_AZ

Fara

I'm not going to pretend to be an expert on mileage - I drive my 944 for fun not economy. However, If you are really looking to reduce the fuel usage, you want to have as efficient a driveline and engine as possible.

Start with a basic service on your engine - new filters (fuel and oil), cleaned injectors, replace O2 Sensor, clean your AFM (or change to a MAF) and make sure you have no leaks in your vacuum lines.

Make sure your torque tube and transaxle are in excellent shape. Driveline losses can be significant power drains and massively increase your rolling resistance.
Make sure your wheel bearings and suspension components are in good condition. Re-pack the bearings with fresh grease to help them move more easily.

Switch to a fuel efficient tire, at least on the back wheels. (Note - I don't recommend this as I prefer my tires to be the safest possible for emergency handling and braking)

Reduce your drag. If you're doing highway speeds, air resistance contributes. Not a massive amount from my understanding, but it will make a difference.

I can go on and on, but the main tricks are to make sure your engine and driveline are in the best shape possible.

944Time

Yes, stale grease will rob fuel mileage.
Another thing that would help is a 'slippery' paint job.

The air will just rush out of the way of this awesomeness.

Paulyy

i get 20mpg... mostly on boost, if not on boost i'm probably at a red light

Nashio

For the best mileage tow your 944, so that way when you reach your destination you will still have a full tank to go enjoy your car with :P

rgs944

It is nice to see fuel economy talked about in a thread. I always tell people that my 944 can get almost 30 mpg and go close to 130mph. I don't think there is another car made in the mid eightes that can match that combo. If I have the numbers correct I believe Dr. Porsche announced the new 944 as having the capability of cruising 45MPH while only using 26HP.

John_AZ

924S sales information by Porsche:



Just what I get with my cars on average.

Hmmm, maybe I'll try a Magneitic molocule organizer attached to my fuel hard line for additional mileage gains!

J_AZ

Arominus

Have your injectors cleaned, make sure your driveline bearings and wheel bearings are in good shape, make sure your alignment is perfect, run narrower tires on the lightest rims you can get (15" phones or Cookie cutters if early offset), Replace or redo your transmission mount if its floppy, run a good synthetic (i use 0w-40) also do so in the transaxle, keep the car clean and waxed, remove all lose items from inside the car, ditch the spare in your garage, remove the upper section of the rear seat, and don't drive like a maniac.

Ive done some of these and get 21/30.

944Ross

On a long trip thru KS, flat as can be, no real wind, cruise control on, and a speed limit varying from 55 - 65, cruising right around 2500 most of the time, I reliably got 29-31 mpg. That is with ethanol-"enhanced" fuel almost exclusively. Yes, it's boring driving that way, but less boring than driving that way in a ****box car.

O2 sensor being fresh seems to help, as do reasonable-sized tires properly inflated.

Funn944

My '86 N/A with 170.,000 miles on it. Overbored throttle body, hi pressure fuel regulator, MSD ignition, MSDS headers, Hi-Flow cat and Magna-flow muffler, got just over 30 mpg between L.A. and Las Vegas going 90 mph for a lot of the trip. A Panamera and a Ferrari playing tag passed me like I was sitting still.
Typically get 22-24 mpg as a normal daily driver in L.A. I usually run 87 octane.

ZR8ED

I agree 100%. I may right lane my 944 to work everyday, but I enjoy it sooo much more than when I used to left lane my Civic to work everyday.

As an added idea, If you are required to drive with your headlights on, you may be able to get away with using your fog lights, and leave your headlights in the down position. Headlights up definately hurt your aero.

catamount

My daily driver for 11.5 years was a 2000 Chevy Suburban LT 4x4. When I bought it new I was keenly aware of it's low fuel efficiency, especially in the city. 12-14 MPG was not uncommon in day to day commuting and worse in the winter with "winter" fuel blends. I never complained about the mileage I got but I did eventually figure out how it get it to rise a bit by altering my driving style. I noticed that I, along with everyone else, raced up to the next light, which usually was red. So I started paying attention to light cycles, watching further ahead to anticipate and started coasting a great deal more.

What happened? Well I went from 12-14 MPG to 14-16 MPG. That might not sound like a lot but thats around a 15-20% increase in efficiency!

I started doing the same with my 951 when I drive it for commuting and saw similar results.

Now, the side benefits, awareness of traffic increased greatly because I was watching out further, stress went down because I wasn't rushing everywhere and I got to enjoy my 951 that much more.

f1rocks

I use 14 gallons every 90 minutes of track time......roughly 8 MPG. Which is way less expensive than most of the cars on track.

Way better than the 11 MPG my tow rig gets going to the track

Van

Who'd thunk anyone would fall for that??? Like deer whistles.

odurandina

a few things that immediately come to mind that u can do....


1. dump the cat. [helped my 968 compensate for running huge tires]....

2. run narrow tires.

3. K&N filter.

4. long tube headers...

5. fresh plugs, wires, and fuel filters.

6. premium gas, [expensive thus defeating the purpose] and possibly adding a few ounces of acetone to your fuel mix.