Gas Mileage Experiences?

[rick3000]

I recently returned from a 750 mile one way roadtrip. So I put 1600 miles on the car total. I averaged around 20-24 around town doing mostly 40mph and some bumper to bumper. On the freeway doing 80mph I got up to 32mpg but the average was around 29mpg. I was even shocked when the OBC told me I had a 500 mile range until I started driving and it dropped to 450 mile range. So it was right around the EPA milage with the air on medium the entire time, and in a 2.5L.

Did you mod anything on the car, I would love to get that kind of milage? Or are your numbers possibly wrong, did you calculate from range or with the OBC?

[BoxsterBob - CA]

Originally Posted by rick3000

I recently returned from a 750 mile one way roadtrip. So I put 1600 miles on the car total. I averaged around 20-24 around town doing mostly 40mph and some bumper to bumper. On the freeway doing 80mph I got up to 32mpg but the average was around 29mpg. I was even shocked when the OBC told me I had a 500 mile range until I started driving and it dropped to 450 mile range. So it was right around the EPA milage with the air on medium the entire time, and in a 2.5L.

Did you mod anything on the car, I would love to get that kind of milage? Or are your numbers possibly wrong, did you calculate from range or with the OBC?

Wow. 32 MPG? The best I ever did in my '99 Ocean Blue Boxster (you have great taste in cars, BTW) was 27 MPG coming home from Lake Tahoe, all down hill. I typically get 20 mpg with 70/30 Highway/City

[pteam]

They say a K&N air filter increases gas economy 5%. Even more if your replacing a pretty dirty filter then going to the K&N. 5% = 1mpg on a 20mpg avg. Who knows if its really true or maybe its really 2% or up to 5% but some is better than none, and its much better than a dirty filter.

Does the boxster S get less gas milage than a Non S?

[JCL12]

I drive an 01 regular boxster with tiptronic.

It is rated for 18/25 (city/highway)

I can get a little over 27.1 MPG on pure highway driving - typical speeds high 70's with a good bunch of 80's and high 60's mixed in with occasional 90-99+.

I am guessing with consistent 68-72mph, I could crack 28 MPG. I think porsche lies about the mpg (or assumes more aggressive diving styles)

[986sport]

I looked up Boxster gas mileage on google, and got a British consumer review on what appears to be the 07 Boxster, 2.7L, 5 speed. They listed 20.9 mpg city, 40. mpg highway, 29 mpg average. I wonder if the Euro Boxsters are more fuel efficient? Mine is a US model from the VIN, made in Finland.

Another factor is the on board computer, which constantly reads mpg since last fillup. That could make you drive more fuel efficiently as you are monitoring it continuously.

[wanna986]

Originally Posted by 986sport

I looked up Boxster gas mileage on google, and got a British consumer review on what appears to be the 07 Boxster, 2.7L, 5 speed. They listed 20.9 mpg city, 40. mpg highway, 29 mpg average. I wonder if the Euro Boxsters are more fuel efficient? Mine is a US model from the VIN, made in Finland.

Another factor is the on board computer, which constantly reads mpg since last fillup. That could make you drive more fuel efficiently as you are monitoring it continuously.

U.K. would be a bigger gallon- approx 4.5 litres- U.S. is 3.8

[abacusnw]

When I fill the tank and drive on the highway at consistant speeds via the cruise control, I get 32 MPH. BUT - when my tank goes down to less then half, the milage drops to 26-28. If I fill up before the tank goes below 1/2 I can get 32 MPH for as long as I keep the gauge over 1/2.

I am reading the milage off of my trip odom and using the fuel pump to meter a full tank until the nozzle goes auto off.

This is a consistant and repeatable event. Confuses the hell out of me.