What affects your MPG? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

sasha055 · 10-12-2010, 02:10 PM

Thanks Tpless, that's exactly how I measure it.. I didn't do OBC hack yet.

Thanks
Sasha

stephen wilson · 10-12-2010, 02:17 PM

Short trips with long warm-up times could make your numbers go down?

ekam · 10-12-2010, 02:21 PM

My right foot.

Cloudsurfer · 10-12-2010, 02:25 PM

That is low. I can easily average 20MPG in mixed driving, and I'm not driving like grandma either.

Flavor 987S · 10-12-2010, 02:34 PM

Find gas stations that sell 93 octane Pure Gas (no ethanol). My gas mileage improves at least 10%. Even 91 octane Pure Gas yields better results.

http://pure-gas.org/index.jsp?stateprov=IL

Pat · 10-12-2010, 03:03 PM

I've also found non-ethanol blended gas can improve performance, but certainly not 10% in MPG. I've seen a couple HP and maybe a fraction of one MPG difference. I've also measured small timing differences.
disclaimer: this was all on my 1999.5 A4 turbo.

Wingnut2u · 10-12-2010, 03:27 PM

I get around 16-17mpg, mostly city driving with a very heavy foot. I also have 18x10.5 wheels with 275 rubber, that doesn't help either

sasha055 · 10-12-2010, 03:27 PM

I'm not lookiing to increase hp/mpg via better fuel or other means (well maybe in future) right now I'm concerned that I'm overlooking something that is not right and I want to get to the root cause

Thanks
Sasha

Flavor 987S · 10-13-2010, 01:56 PM

Quote:

Originally Posted by Pat

I've also found non-ethanol blended gas can improve performance, but certainly not 10% in MPG. I've seen a couple HP and maybe a fraction of one MPG difference. I've also measured small timing differences.
disclaimer: this was all on my 1999.5 A4 turbo.

In my 2006 Boxster S I easily go from 22-24 MGP to over 26 MPG.

In my 1997 911 (993) Turbo I easily go from 14-16 MPG to over 18 MPG.