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  1. Join Date
    Oct 2002
    Posts
    2,719
    #11
    I agree with those who say that driving habits can drastically alter fuel consumption. With this in mind, a vacuum gauge that do not cost much is the best indicator for real time fuel consumption, albeit indirectly.

    The vacuum gauge is connected to monitor vacuum pressure at the intake manifold. As any competent engine mechanic knows, vacuum drops when the throttle is opened and vacuum increases when the throttle is closed (as in during idle). Hence if one installs a vacuum gauge and drive in such a way as to keep the vacuum level at fairly higher value most of the time, then fuel consumption will be lowest.

    Try it, and you will notice that vacuum can be maintained at higher values (lower fuel consumption) when you are easy on the gas pedal. Somebody once said that the most economical driving is to imagine that there is an egg between your foot and the pedal and drive without breaking the egg. This can be proven true with a vacuum gauge. With Manila traffic, there is no point being hard on the pedal. As you increase speed on the highway, one will notice that is becomes difficult to maintain higher vacuum, consistent with the fact that high speed requires more fuel.

    So install a vacuum gauge, take care of that egg, and save fuel ! :D
    Last edited by kinyo; October 6th, 2004 at 01:03 AM.

Gas saving device