Boxster's this much of a gas eater?
 

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.

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

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.

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

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

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.

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?

"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."

Wow, thats impressive mileage for a 01 "S", what speed do you do your highway driving? I just went through a tank of gas at a constant 78mph and only got 28mpg with my base 2000.

Ed

:D

Wellthat's one thing down. I would suggest that if you have a 4 yr warranty you get it in to the dealer ASAP. Warrantys go by datb in service not year so unless your car was 1st put into service in November or Dececember your warranty is gone.

A chip tune is where they take appr. $1000.00 of your cash, promise you 25 to 40 more HP and you end up with 15 more HP and better gas milage. Do a search on it and you will find plenty.

When I filled up (93 octane) yesterday, full tank --- 02 S --- it immediately said "260 miles" left on my trip OBC. Is that right? I thought I heard people getting 300-400 miles?

All service has been done religiously on this car and it is in excellent shape. I brought it in and had every single thing fixed on it. (including cleaning radiators, lower loose front spoilers, cracked radiator air intake ducts, loose wiring, anything that remotely needed to be made perfect) - I don't know what else could be contributing to the low MPG rating. Plugs were changed 8k ago, filter was changed 500 miles ago, everything seems ok. Is this normal range for a 3.2L?

Thanks.
:cheers:

The OBC is giving you its "best guess". Reset the trip odometer when you fill up, drive most of a tank out, then refill again at the same place and do the math to get your real gas mileage. Then you'll know if you have a problem or not.

I consistently get 22-24mpg on my '01 S. However, when I drive in an "exciting" manner I swear I can actually see the fuel gauge indicator drop.

Good idea and common sense...(something I miss from time to time) ;)
thanks.

Amen to checking it with a refill. On the highway, I get 26 - 29 mpg, but the first quarter of a tank the gauge drops like a buick pushed off a cliff. It was a little alarming to me till I figured out it was just the gauge. Dunno if that's typical of the Boxsters....

Same with mine. It never quite hits the full mark, and it's down to 3/4 before you can say "New rear tires, please". :rolleyes:
The trip from there to 1/4 is much slower.

Bad MAF or O2 sensors could also lead to running richer and less efficiently. Just a thought...

-David

[QUOTE=meerzee]Is that right? I thought I heard people getting 300-400 miles?
QUOTE]

I hit the trip reset at every fill-up. I got 318 miles last fill-up and 322 the time before. Both highway & city -- 22/23 mpg.

Maybe I could get near 400 miles if I didn't like the sound the box makes under open throttle so much...

Eomak, do you have an overly large and muscled right calf? Good flexibility in the Achilles tendon? You could be suffering from heavyrightfootitus. This will eat gas. :)

Here is Randal Neighbor's calf. I snaped this at The Tail of the Dragon!: :D

Have you actually calculated the MPG? What is it?

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.

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?

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

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?

:)

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.

How many gallons of fuel does a 986 hold? A 987 holds just over 16 gallons.

Well my last tank, I got 361 miles till my gas light came on. Then I filled up my car when the gas light came on and my reciept said 13.9 gallons. So I'm estimating 26MPG with 1/2 city 1/2 fwy. And I don't drive slow. Hehe...

Here is a link to a great EPA website that has a database on mileage for lots of cars:

EPA Mileage Website

according to the site, a Boxster S gives these numbers:

2000 16/23

2001 16/23

2002 16/23

2004 16/24

2006 17/25

2007 18/26


Ed

:cheers:

I figured it out and I am seeing something like 14MPG overall. Dealer says it is my right foot and a S won't get any more than that in city driving, but I tell you that I don't drove drive it hard compared at all. Not much difference than my Tahoe for the most part, don't roadrace from light to light, or anything even remotely aggressive. I feel that the car feels slightly sluggish, even more so since my "Revo" technik free trial, but the mileage wasn't any better before than time anyhoo. Complete 60K no-expense spared tuneup at Porsche dealership was done less than 10k ago with new replacement Porsche engine.

Think it could have been broken in badly or perhaps the CEL is just not working?
It just "feels" slightly off....no backfire, rough idle or anything of note.....just feels like something is not tuned 100% IMHO.

Any ideas or things to check?
Thanks.

Meerzee,

I don't know much about engines but I get exactly the same fuel figures as quoted below from the EPA, and I drive my '02 S the way it was designed to be driven, hard and fast, so I'd say there's something not right about your engine if your getting contant 14's with sedate driving.

-Ozspearo

Yep, I am bringing it to a new service shop on Tuesday. I called and tried to speak to the owner of the shop I just spent several thousands doing routine repair and upkeep work and he didn't take my call nor called me back over the last 2 days.
I have an appointment @ Lindsey's (In Kenner) where they are planning to do a complete diagnosis and see if they can tell anything wrong. Car is not running poorly, no CELs, no smoke, no rough idle, --- engine is very strong and car seems to be in simply great condition. I just am trying to figure out the MPG issue....if it is just me or my engine, then so be it I guess, just want to know for certain that everything is perfect with the car.

Hopefully no surprises. :cheers:

There is no way to get 14 mpg in a car as light as a Boxster without driving flat out all the time. There is definitely something wrong with your motor.

My '97 3.4 gets 25-26 mpg with "normal" driving (whatever that is!), 16-17 when I give lots of demo rides on a tank (i.e., flat out runs to 130+ mph and just plain hammering the crap out of the car) and will get 29 mpg on the highway if I keep it under 80 most of the time.

I think it all has to do with your driving style and how often you use the cruise control. I get 19 in the city and at least 21-27 on the highway using the cruise control. I've actually seen the MPG rise and go "up" while driving it with the cruise control on while on the highway. If you use 5th gear or 6th for you "s" owners while on the highway with the cruise control on, you will see this happen. ;)

Could be the fuel filter needs to be replaced. Manual says should be done after 60K. But mine seems to be fine. Nice looking car (efahl) by the way.

I just filled up and got 400 miles on one tank easily. 2.7 liter engine. Mostly country roads driving at about 60 mph. About 31 mpg. I think I need to drive it harder. LOL What do you think ??

That sounds right to me. Look at this picture I took the other day. My gas tank isn't even full, yet I have 361miles to the next fill up. Not bad. If it were full, it would probably be around 400. Use your cruise control, it helps!
http://i5.photobucket.com/albums/y15...ic110407_2.jpg