Re: Consistent 23 mpg on the highway with tweaked APC box? - Saab 900 Bulletin Board - Saabnet.com
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Re: Consistent 23 mpg on the highway with tweaked APC box?
Posted by mac [Email] (more from mac) on Fri, 5 Sep 2008 13:34:38
In Reply to: Re: Consistent 23 mpg on the highway with tweaked APC box?, Yipcanjo, Fri, 5 Sep 2008 13:03:15
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no turbo in my 5-speed 93.
I've fought low mileage (19-20 on regular, about 10% better on premium--because, I presume, the anti-knock advances a little improving efficiency).
I did find that about 2 oz of acetone in a 10 gallon fill of regular did push mileage up to almost 26. 2/10 gal seemed to work better than 3-4. For about 1000-1200 miles. A quart of 'tone costs about $5, a measuring cup and funnel another 5-6.
Then I tried it with premium, but the results were disappointing. Car's been down (several things) since so no additional experience.
I tried the same dose in my 92 Olds and 84 BMW to a null result.
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