You're only about 1.5/2.5 mpg off of your expected peak. I suggest you track
that over several tankfuls to get a better average reading, but in the
meantime you could do all the other little things "they" recommend (tire
pressures, etc.), and the things Peter mentioned.
Check for air/vacuum leaks that could be causing your O2 sensor to
overcompensate with extra fuel; keep an eye on your tach and try to see if
you have any slipping (increased revs without a corresponding increase in
speed).

Cya,
Robert

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael Sullivan
Sent: Tuesday, July 20, 2010 2:58 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Gas Mileage Improvements?

I have a 91 GL Auto with approx 188K miles.  I tracked a recent tank from
empty to empty again.  I put in 14.4 gallons and got 218 miles out of it.
This equates to only 15.14 mpg.  A/C was off majority of time. This sucks
worse than I thought.  These are a mix of highway and city miles.  Can I get
some suggestions on improving this, please?
 Michael in San Antonio
P.S. No engine conversion suggestions, please.  Thanks in advance.
91GL Weekender AT 2.1L 'Gringo'
73 Beetle