quattro digest, Vol 1 #3896 - 200Q Fuel

[Larry C Leung]

So THAT explains it!

BTW, I DO believe that the difference in octane makes a
notatble difference in fuel milage. Although I haven't really
experimented with the 200Q (not willing to play with a
turbo and low octane gas) I did some very carefully monitored
experimenting with my knock sensor equipped GTi (HD motor,
single knock sensor, 10.1:1 compression, CIS, essentially the
same motor for 4 cyl 85+ non quattro 4K's )
and found that I got a consistent 5 - 7% increase in fuel
economy going from 87 Pump to 93 Pump octane. Now that
car MOSTLY ran 93 during the Auto-X season, but once that ended
I did use 87 (DEFINITELY noticeable increase in knock at throttle
tip-in, with the associated loss of throttle response) as, if you
calculate it, the increase in fuel economy in % is most definitely
less that the increase in cost per gallon of the fuel. Being the
GTi is an aspro car, I was less concerned about running the
lower grade fuel than in the turbo car.

LL - NY


> Date: Sat, 31 Aug 2002 11:29:16 -0500
> From: "aukdav" <aukdav at mail.ccsdana.net>
> Reply-To: <aukdav at mail.ccsdana.net>
> To: <iceisit at earthlink.net>,
>         "Roger M. Woodbury" <rmwoodbury at downeast.net>
> Cc: <quattro at audifans.com>
> Subject: Re: 200 Q fuel
>
> Bigger turbo equal better mileage, as you are not spooling it up on
> the low=
>  rpms.  Seen it time and again with my car (89 200tqw w/k24 and 1.8
> chip/sp=
> ring) versus brothers car (89 200tqw w/k26/27 and 2.0 chip/spring)
>
> Dave