-Just bought my first Porsche 2 weeks ago. As expected, I bought a Cayman 2007- very excited . . . amazing car! I have been driving for 2 weeks and was wondering when the fuel economy that is expected will kick in- not that this will hinder me from enjoying my car any less. I purchased it with 18miles and it was running at about 9mpg city. Now I’ve put a total of about 450 miles and its running at 16.3 mpg city. In theory the car should run at 23mpg city and 32 mpg highway. How many miles into the engine will it start running closer to these estimates. Thanks

How hard do you drive it?

I have a 2.7 Cayman. I drive pretty hard and I am getting about 22.6 mpg (about half city and half highway).

I drive my CS mainly in the city and am getting about 14mpg.

This is mainly under 4000 rpm for now since its (2.7 cayman) still new. I was told at dealer when I saw the 9mpg that it would improve as the engine broke in. It’s improved, as I mentioned above, but I wonder if it will ever reach the 20ish mpg in city- maybe when it’s a few 1000 miles in. Does anyone get 23mpg city?

I am driving a 2008 CS. The estimates are 18 mpg city and 26 mpg highway. I have about 1250 miles on the car and have been driving it very conservatively thus far, not exceeding 4200 rpm, and being very careful. I was very disappointed at first- First few tanks I was getting 17.2-17.5 mpg. Then I got 18.5 in a tank, followed by 20. But most of my driving has been mostly highway driving to put on break-in miles or highway driving to go to bicycle ride starts. I am shifting a great deal so that I do not stay at any rpm for any perioed of time. I can possibly see getting resonable mileage on the highway later, but I never expect to get 18 in the city or 26 on the highway. My guess is that I will be fortunate in getting 18 in mixed driving.


DoobyDarby

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does anyone know how to reset the mpg calc in the computer? I'd like to be able to see what I'm getting on a tank-by-tank basis

20.5 for me my last 400 mile trip to the mountains with 2300 miles on the od cs

See attachment. Go to 'Reset' and then 'Average Consumption'.

Attached Files

2007 Owners Manual (page 135).pdf (54.6 KB, 39 views)

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I've got 2800 miles on my CS 6spd and I am getting 18-20 mpg in a combination of city/hwy driving, e.g., I'll average about 32-35 mph on a tank. I drive a little conservatively, but never get left at a light and when the opportunity presents itself, I'll wind out 2nd gear (5-6 times on a tank) and wind out 3rd (maybe 2-4 times) during the tank. I'm taking a full-fledged road trip (380 miles each way) this weekend and will get a chance to check the hwy mileage.

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I do the same thing, I reset the average mpg with every fill up. When you have the average mpg up on your display, pull the information stalk towards you and hold it until it resets. When reset, the display will look something like this: --.-

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I get 15.5 in CS on mostly suburban driving. It would be nice to do polls on C/CS with several ranges. I'd be curious to see where I fall.

My Cayman 2.7 has 6000 miles - averaging 26mpg with a mix of city/highway. Highest was about 29mpg on a tank and lowest was about 22.

I have recorded every tank of gas and have seen no significant changes / improvements from the first tank. Maybe a slight improvement because of the breakin period I drove pretty easy.

I my opion mpg is heavily based on you and your right foot not the window sticker. Window sticker calculations have been misleading for years and are being revised for 2008.

my 2.7 with about 2300 miles on the clock has averaged a disappointing 18.5 mpg on mixed driving (50%city/50%highway). i'm not an agressive driver nor do i carry anything heavier than a gym bag (no passengers). i reset the average mpg display every time i fill gas (i also use the old fashion method of determining the average mpg).

some have suggested that i change my shift points. however, there is no consensus whether i should shift later or sooner. typically, i shift between 2800-3200 rpm. some suggest that i shift closer to 4000 and others suggest that i shift closer to 2500.

btw, the epa has modified its methodology of estimating mpg. when i purchased my 2.7, the epa estimates on the window sticker indicated 23mpg city/32mpg highway. with the new method, the estimates are now 20mpg city/29mpg highway. in all events, i'm still well below the estimated average. i believe that the epa's website has a feature that will enable you to calculate the estimated mpg under the new method.

Based on my daily commute from Central Marin to the SF financial district, I'm averaging 22mpg with 8K miles on the clock. Factor the big hill north of the GG bridge and "competitive" driving through the city. I average 26-28 mpg when I drive out to Sacramento (primarily flat) keeping it between 75-90 mph. Overall the C gets better mileage than my old Miata and Subarus.

The bad part is I never wanted to challenge myself to get good gas mileage in my Porsche