Rennteam 2.0 - EN - Forum - Weather is bad, mileage is good - Page1

Jul 19, 2005 2:56:50 PM

mcdelaug: Expert; Loc: Fort Worth, Texas , United States; Posts: 1838, Gallery; Registered on: Mar 3, 2004

Weather is bad, mileage is good

What with two hurricanes in the Gulf of Mexico the weather has been "suboptimal". So I've been finding other ways to entertain myself with the 987S.

Yesterday I decided to see what kind of mileage I could produce with some careful driving. I know this is boring, but I was curious, so humor me

. Anyway, with the cabin sealed, AC off and cruise control on 62mph (100km/h) I registered 31.8mpg (7.4L/100km) going both directions over a 30 mile stretch of road. I was rather surprised, but I guess it makes sense given the Cd of 0.30 and relatively low rpm needed to cruise at this speed in 6th gear. Merely turning on the AC lowered my mileage to 29.8mpg (7.9L/100km) however. My typical mileage, including city and highway miles, and driving the car fairly aggressively, resulted in 17.6 mpg (13.3L/100km). Anyway, hardly a scientifically valid test, but I am impressed with the flexibility of this car. Besides being such a blast to drive, it really can be fuel efficient when needed.

I hope that the weather is better this weekend so I can get back to more involving driving though.

mcdelaug

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Jul 19, 2005 3:17:06 PM

Dr. Phil: Rennteam Master; Loc: Denmark , Denmark; Posts: 5884, Gallery; Registered on: Nov 30, 2004; Reply to: mcdelaug

Re: Weather is bad, mileage is good

Yeah, mine does 15 km/liter when I drive VEEEERY carefully.
Trouble is not that the car isnt fuel economic as such, but one tends to push the right pedal a wee bit too hard.

I like your report.
As they say; "Intelligent people are never bored"...hehe

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Jul 21, 2005 3:13:07 AM

long720: Co-Pilot; Loc: japan; Posts: 172, Gallery; Registered on: Jan 8, 2005; Reply to: Dr. Phil

Re: Weather is bad, mileage is good

what's the RPM in 6th @ 100km/h?
if the RPM is low (or maybe too low) then are we putting stress to the engine?

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Jul 21, 2005 12:55:36 PM

mcdelaug: Expert; Loc: Fort Worth, Texas , United States; Posts: 1838, Gallery; Registered on: Mar 3, 2004; Reply to: long720

Re: Weather is bad, mileage is good

About 2200 rpm. Fine for cruising, but I downshift for any acceleration.

mcdelaug

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Jul 22, 2005 3:29:06 PM

CharlesL: Newbie; Loc: Hants, UK; Posts: 48, Gallery; Registered on: Jan 16, 2005; Reply to: mcdelaug

Re: Weather is bad, mileage is good

If you want to try and improve on that, try turning cruise off. On a different car I had with an instant mpg display you could see it drop by 1-2 mpg when cruise was enabled. Not sure why.

On longish journeys (50 miles+) using motorways I have seen 36 (imperial) mpg when driving sensibly (passenger seat speed limiter installed

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Jul 22, 2005 5:27:02 PM

mcdelaug: Expert; Loc: Fort Worth, Texas , United States; Posts: 1838, Gallery; Registered on: Mar 3, 2004; Reply to: mcdelaug

Re: Weather is bad, mileage is good

Sorry, it's 2600rpm, not 2200.

mcdelaug

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