Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 05-19-2008, 12:36 PM   #21
Registered User
 
Join Date: Feb 2007
Location: Phoenix
Posts: 178
Quote:
Originally Posted by 987gator
For an 05 987: Pre 10% ethanol in all central florida fuel - 23 to 24 mpg mixed highway / city driving. 29.5 mpg on an Atlanta to Orlando trip, top up, 75 mph tp 80 mph.

Now with the 10% ethanol fuel - 20 to 21 mpg mixed highway / city driving. I have not done a road trip, but right after fill up, on a 10 mile highway stint at 75 mph the OBC noted 27 mpg.

It may be a coincidence, but I think the ethanol blend has robbed some fuel efficiency.
Ethanol has a lower energy density than gasoline, hence the lower mileage.

I generally get 19-20 mpg from my '03 2.7L w/Tip in mixed city/fwy driving. However, given gas prices, I tried soft-pedaling it on the last tank, keeping it to 75 mph on the fwy (instead of 90 mph), and using my cruise control. All that brought me up to 22 mpg - not sure it's worth it.
__________________
Paul B. Anders / Phoenix, AZ
1970 Porsche 914 / 2003 Porsche Boxster / 2009 Honda Fit Sport Auto
pbanders is offline   Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:54 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page