Boxster MPG

[fatmike]

Originally Posted by matty-matt

top down, highway @ 70mph.ish 25mpg
top up, highway @ 70mph.ish 28mpg
around town and what not, 21mpg

2001 boxster s 6-speed

Wow! 450 miles per tank on the highway!

I've never gotten much over 360-375 miles in a tank (23.5 mpg). I click the mileage reset after every fill up and generally put in 16 gallons every time. I've never, ever, reached 400 miles. I can't imagine averaging 450 miles.

I have noticed a big difference with the top off. Definitely lose a few miles per gallon.

I generally get 325 miles per tank (20.3 mpg) in mixed highway/city (top up/top down) driving.

[tonycarreon]

the furthest i've ever pushed it was 400 miles and i was sweating bullets (mostly because i turned the a/c off at the end) when i finally found a gas station.

i guess theoretically you can get 450 miles on a tank. that comes out to around 26.6 mpg using every last drop...

[Overdrive]

I figure efficiency improved as the years progressed even with the increases in horsepower, but if I remember right the sticker on the car said 24 or 26 highway during the first years of the car. I never expect to get sticker estimates, so I'm happy so long as it's in the 20s. I don't know how some people are getting that good mileage unless you're really cruising at the speed limit in top gear, which I'd love to do if the engine didn't apparently dislike it so much.

[hallonz]

Boxster 2.5 w tiptronic, ECU is tuned/remapped

I get 21-22mpg mixed driving. Around 24mpg highway.

Before the tuning I got 18-19mpg


Getting a remap is the best performance mod done so far, better fuel economy and more power!

[thstone]

1999 2.5L 5-speed

Typical 21-22mpg. High 24, low 19. Drive it like I stole it on 91 octane Commiefornia Premium Unleaded with 10% Ethanol.