Boxster's this much of a gas eater? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

eomak · 10-29-2007, 04:48 PM

Hi, thanks all for reply's .I've had this 2003 2.7litre boxster for 3 weeks now and noticed that it is a pig on gas.I dont drive it hard,its like driveing a 350 big block camaro.My 911SC, not this bad.Just to work and back is around 30mi/80KM. which is mostly highway driving and under 3k rpm.On the gas gauge the line's betwen the white marks i can pretty much c the needle drop from 1 mark to the other on the way into work ,.This normal?If is, that means like $100 a week on gas.My 5.0 mustang lasts 5days same route.Doesnt seem right.I'am takeing it to the porsche dealership at the end of the month to solve the problem with the rattle nosie in the rear end.Some say it the cats,heatshileds.Would this be also a sign that the cats. are bad and giveing poor gas milage or something esle?Also not sure when last tune-up was.I'll be doing oil/sparkpug.filters/myself.Do they hook these engines up to a computer for final tune-up check timing all that stuff?I'am use to useing my timing gun on the 911SC.

Padawan · 10-29-2007, 05:07 PM

My '00 2.7L is not particularly thirsty, and in fact does rather well on highway trips.

ancster · 10-29-2007, 05:23 PM

I'm averaging between 9-10L/100km (24-26mpg) for highway/city driving. Using 6th gear on the highway helps improve the mileage. When just highway driving, I can get 29-30mpg.

I noticed an improvement after having the car serviced.

djomlas · 10-29-2007, 05:34 PM

i get about 21-22 all the time.
try getting a new filter, oil, and spark plugs, should all help ya out.

FrayAdjacent · 10-29-2007, 05:40 PM

I have an 01 2.7, and can average 19ish city, but I can get 31mpg highway.

der Geist · 10-29-2007, 06:58 PM

I have an '03 2.7 as well and it gets pretty good milage. After the chip tune I marked an average of 32 MPG on the highway. When I am not on trhe highway I usually get in the high teens. You should check your air filter 1st thing, then your plugs as djomlas pointed out. Your plugs should be a nice tobacco brown. Do you know what the service record is like with this car? Since you just bought it I would be highly suspect of the past serviceing even being done let alone being done properly. Your problems can probably be diagnosed pretty easily by a qualified mechanic. Pull out that air filter and give it a firm tap. If it's loaded with dust your choking your air supply.

eomak · 10-29-2007, 07:17 PM

thanks for reply's. The air filter wasnt that dirty at all. Car has 33,000miles on it.The engine compartment is pretty clean too just needed a dust rag to clean it but looks new.The car was a 1 owner Cal. car and looks like it was well looked after.Carfax check out o.k. before i bought it but i took a hunch on it and didnt bother to get it checked out buy mech.Full 4 year warrnty hopfuly looks after the mager stuff.The chip tune thing what is that?And for the spark plugs they come pre-gap already?

Brucelee · 10-30-2007, 06:03 PM

Quote:

Originally Posted by eomak

Hi, thanks all for reply's .I've had this 2003 2.7litre boxster for 3 weeks now and noticed that it is a pig on gas.I dont drive it hard,its like driveing a 350 big block camaro.My 911SC, not this bad.Just to work and back is around 30mi/80KM. which is mostly highway driving and under 3k rpm.On the gas gauge the line's betwen the white marks i can pretty much c the needle drop from 1 mark to the other on the way into work ,.This normal?If is, that means like $100 a week on gas.My 5.0 mustang lasts 5days same route.Doesnt seem right.I'am takeing it to the porsche dealership at the end of the month to solve the problem with the rattle nosie in the rear end.Some say it the cats,heatshileds.Would this be also a sign that the cats. are bad and giveing poor gas milage or something esle?Also not sure when last tune-up was.I'll be doing oil/sparkpug.filters/myself.Do they hook these engines up to a computer for final tune-up check timing all that stuff?I'am use to useing my timing gun on the 911SC.

Have you actually calculated the MPG? What is it?

eomak · 10-30-2007, 08:46 PM

The thing that just bugs me is just c'ing how fast the needle on the gas gauge goes down baby driving the car.Maybe new spark plugs will help what other peeps have said plus the bad cats. i may have if thats where the rattle,tin hitting metal sound coming from rear end when cars warms up to normal temp. Thanks for rely's again.

eomak · 10-30-2007, 08:47 PM

lol nice calf.Size 14 shoe size? I'll fill up my tank to full, set 0 on the odmerdor reading.Whats the KM'S/Mil. on full tank? 300KM's?

blinkwatt · 10-30-2007, 09:18 PM

Does anyone know the estimated MPG for the 00-02' 3.2L engine? How much did it differ when from 02'-04'?

fatmike · 10-31-2007, 08:07 AM

Quote:

Originally Posted by blinkwatt

Does anyone know the estimated MPG for the 00-02' 3.2L engine? How much did it differ when from 02'-04'?

Mine's an '02 S. Details a few posts down (roughly 320 miles per tank, which is 23+mpg) in mixed driving with plenty of wide open throttle. Also, DJ1 also posted results of 22-24mpg for an '01S in this thread as well.

Brucelee · 10-31-2007, 05:46 AM

Quote:

Originally Posted by eomak

The thing that just bugs me is just c'ing how fast the needle on the gas gauge goes down baby driving the car.Maybe new spark plugs will help what other peeps have said plus the bad cats. i may have if thats where the rattle,tin hitting metal sound coming from rear end when cars warms up to normal temp. Thanks for rely's again.

Again, I would forget about the needle until you actually calculate the MPG you are getting.

Did I miss the number or have you posted this yet?