thsung

Used 2004 CS, goes only 280miles or 450km. Had this car for 2 months and I'm thinking something is wrong with the mileage ... I drive this car until the gas is empty and it gets really crappy mileage. There are no leaks, I fill up with octane 91, recently oil change was done, fuel injector cleaner was put in and no warning indicators. Car is in mint condition.

Km1.8t

I have an 06 CS and get around 400 miles per tank 93 octane. Sounds like you may have a problem somewhere.

deilenberger

280/20 = 14 MPG. If you're doing primarily around-town driving, and you're not running the tank (24 gallon capacity IIRC) dry - that's pretty much normal. I got 19.5 MPG in a 8,500 mile coast-2-coast-2-coast trip. Best mileage observed was a bit > 20MPH at a constant speed (around 75) on level ground, using the cruise control. If you do around town a lot, or are enthusiastic with the fun pedal - your mileage sounds absolutely normal.

thsung

I do a lot of driving in the city, not much highway (maybe 15%). If you say this is normal then I'd have to suck it up and pay for the gas! XD

medacus

City driving is awful. Highway I usually get close to 20. City can range between 11-15. I have a 2008 S

Little Green

Good lord if I hit 225 miles per tank of 93 octane I think it's good. Ussualy in the 200 MPT club. I do beat her though. May have something to do with it. I have never seen 400 per tank. even straight highway from PA to Fl once a year I see maybe 325 per tank around 70 mph

Divot

Something is wrong. I get well over 400 mpt on the highway at 65-70. Closer to 500.

Little Green

What could it be? I fill up every week. Sunoco 93 octane. She runs great but fuel econ sucks. during mostly city I am between 10-12 mpg. Tried driving slower. Mild imporvement to maybe 13 mpg.
Plugs, Filters?

Divot

Loose nut behind the wheel?

ltc

ECU S/W update?
TCU S/W update?
Cracked coils leading to fouled plugs?
Alignment ?
Cayenne overweight due to the weight of the water in the horns and rear spoiler?

All known issues you can easily track down and address if you really believe there is a problem.

Slow Guy

I drive at 80 - 85 when traffic allows, sometimes when it doesn't allow too. I'll never see close to 500 a tank.

I don't bother to check anymore, if I'm concerned about mileage I take the M3 or the 993.

RESP

Logic seems to dictate, if you want better mileage for in town driving, get a car for fuel efficiency.
If you want the fun of the CS, you have to pay the premium.

Your choice - emotion or logic.

ltc

Prius or the P!g ... I know this is a trick question, give me a minute.

ltc

I KNEW it was a trick question.

The answer is to buy the Cayenne Diesel ..., wait, what's that, Dr. W. said NEVER...

OK, then buy the Cayenne Hybrid ...., wait, what's that? FIIRE?

OK, then buy the Touareg Diesel....extra credit if you can get a V10 TDi .

mudman2

As has been said, 14mpg is normal short range around town, city driving . On a decent highway run I get about 16.5, used to be 17.5-18.5 back in the day when she was younger. 11.5 when towing a beast.