I've heard of this "dramatic" drop-off in fuel economy over 65mph, but never
experienced it.  I use 4K as my personal red line, and almost never exceed
it, due to the fear of reduced engine life.  This gives me a top speed of
72mph.  I have never had a noticeable change in fuel economy the few times I
have driven at a speed of less than "full cruise".

Karl Wolz

----- Original Message -----
From: "Chuck Mathis" <CMathis227@aol.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, July 11, 2000 5:56 AM
Subject: Re: Fw: Safe rpm's for 87 wolfsburg edition 2.1L????

> It looks like Paul is keeping his engine rpm within the VW recommended
limits for safe engine speed.
>
> That said I have to add that my gas mileage drops off dramatically at
speeds above 65 mph.  There is simply too much frontal area coupled with too
much mass and too little horse power for the flat four to efficiently push
along the highway at higher speeds.  Can the Vanagon make the trip faster
than 65 to 75 mph?  Sure.  Can it do it more than once?  Most assuredly.
Will you get maximium engine life driving "fast" all the time?  Hell, no
>
> Between 65 and 75 mph your gas mileage drops dramatically and engine wear
increases.  How much will it reduce the engine life?  Depends on the quality
of the engine.  If you have to have the extra speed just pack some extra
cash in a savings account for that new engine you'll need in a few years.
>
> Chuck
> '85 Westy Wolfsburg Weekender 1.9L Automatic 'Roland'
>