LOl ok, my dad (a born ecomodder) bragged about averaging 6 mpg, so 9 was rather high.
And to Cali98, this tidbit interests me...
Quote:
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The Platinum 22 injects a platinum vapor into the combustion chambers of the engine by inserting a T connector into a vacuum line.....
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I had a vacuum leak in my maxima once, and although it increased the economy, it made the car difficult to drive. I suspect simply allowing a vacuum leak would achieve similar results. I am dubious about injecting platinum "vapor" anywhere....wouldn't the platinum be depleted eventually? Platinum is used in catalytc convertors, but a minimum amount of heat is required for the reaction to occur.