07-30-2011, 09:15 PM
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#1
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Registered User
Join Date: Mar 2008
Location: Texas
Posts: 23
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Boxster MPG
So i am wondering what everyone gets MPG wise in their boxsters. I calculate mine when i fill my tank to full, number of gallons i put in, and divide the number of miles ive driven since last fill up by those gallons.
1999 2.5l 5-speed
My best mpg was 23
and my worst was 18
these are for nearly full tanks
i typically get 19-20 mpg anymore.
Am i getting low gas mileage? I drive very conservatively most of the time.
Any suggestions? maybe something isnt working right?
Also just curious what you guys are getting in various years and models
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07-30-2011, 09:23 PM
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#2
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Registered User
Join Date: Jul 2011
Location: niagara falls ont.
Posts: 19
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2000 boxster 2.5.......consistantly at 20.1 mpg
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07-30-2011, 09:59 PM
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#3
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Registered User
Join Date: Jan 2010
Location: Redmond, Wa
Posts: 369
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2000 Boxster base, 2.7L 76K miles
I'm checking my MPG just like you.. every time I fill up, I pull my phone to do the calculations 
I was getting 16-18mpg, and I drive about 40/60 city/HWY.
For last 2 tanks I'm up to about 20mpg thanks to technotorque, but then again.. I cruise at over 3K rpms
Sasha
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07-31-2011, 03:45 AM
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#4
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Registered User
Join Date: May 2009
Location: Frederick, MD
Posts: 1,396
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on long trips (on the highway full time) i get 24, otherwise i get around 19 mixed driving (and i don't necessarily drive "conservatively," so punch it more...  )
__________________
"Speed has never killed anyone, suddenly becoming stationary... that's what gets you."
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07-31-2011, 04:20 AM
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#5
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Registered User
Join Date: Jul 2009
Location: Arlington Heights, IL
Posts: 1,561
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2006 Boxster S (pushing 43,000 miles now!  )
Spirited country roads I get low-low 20's.
Highway cruising I get over 28.
I'm never in city stop & go traffic.
99.99% top down.
I exclusively purchase 93 octane without ethanol. Makes a HUGE difference.
Last edited by Flavor 987S; 08-01-2011 at 06:47 AM.
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07-31-2011, 06:37 AM
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#6
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Registered User
Join Date: Jan 2007
Location: BC
Posts: 1,346
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25 miles/US gal on highway driving, using 94 octane
__________________
2001 Boxster, 5 spd, Seal Grey
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07-31-2011, 06:48 AM
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#7
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Registered User
Join Date: May 2011
Location: Maine, USA
Posts: 126
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03 Boxster S
Best 26.8 highway
Overall, about 21
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07-31-2011, 07:31 AM
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#8
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Registered User
Join Date: May 2008
Location: MN
Posts: 327
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According to my OBC hack, my 2002 2.7 averages 24-25mpg with mixed driving on most tanks. I have seen as low as 17mpg with harder driving and as high as 31mpg on long freeway trips. I always use premium but we also have a mandated 10% ethanol which is said to reduce mileage so my mileage could be even better.
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07-31-2011, 08:51 AM
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#9
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Registered User
Join Date: Jul 2009
Location: Arlington Heights, IL
Posts: 1,561
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Quote:
Originally Posted by MN 986
I always use premium but we also have a mandated 10% ethanol which is said to reduce mileage so my mileage could be even better.
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There is a TON of ethanol free gas your great State of Minn. You just have to know where to look. IMHO, 91 pure gas is better than 93 with ethanol:
http://pure-gas.org/index.jsp?stateprov=MN
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07-31-2011, 03:58 PM
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#10
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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2001, 28 highway, 21 around town, I like to floor it often. 93 Octane BP with 10% ethanol.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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07-31-2011, 04:57 PM
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#11
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Registered User
Join Date: Nov 2006
Location: bloomington, in
Posts: 56
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top down, highway @ 70mph.ish 25mpg
top up, highway @ 70mph.ish 28mpg
around town and what not, 21mpg
2001 boxster s 6-speed
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08-01-2011, 04:02 PM
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#12
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Registered User
Join Date: Jul 2011
Location: Denver/Winter Park, CO USA
Posts: 600
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My combined city and mountain driving nets 26 - 28.6 MPG. It doesn't matter if I'm kickin' it in the mountains at 90+ or keeping it "legit" around 65-75. Great car with great mileage.
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Denver Steve
Carrera, Cabriolet, 6-Speed, Black/Tan
Last edited by DenverSteve; 08-02-2011 at 06:32 PM.
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08-02-2011, 03:58 PM
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#13
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Registered User
Join Date: Oct 2008
Location: Colorado
Posts: 317
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I've checked the mileage on my 03 Boxster S several times and always am right around 27 mpg, virtually all highway driving since I live in the country. Doesn't seem to matter that much if I drive it like I stole it, or just putt around, always right near 27 mpg.
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Dave S.
2003 Boxster S
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08-02-2011, 04:47 PM
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#14
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Registered User
Join Date: Jan 2010
Location: Orlando
Posts: 290
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According to the car, I get 18.7. That is the average over the last few months.
I haven't done the calculations myself.
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