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    Nitrogen in tyres

    Just a few points. Air contains roughly 78% nitrogen, so when inflating your tyres you are getting mainly nitrogen anyway. Many of the benefits claimed of nitrogen could be achieved by using dry compressed air from a good compressed air system. Its the moisture in the air that causes most...
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    Aircon effect on MPG

    Car air con compressors consume about 5 KW (6 HP) of energy when running. This equates to about 2mpg on your average fuel consumption. Obviously the smaller the engine the greater effect. As previously stated the compressor has an electro-magnetic clutch so it won't be running continously and...
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    Got new tyres before

    Seems a good deal. Have just been quoted £75 fitted for those exact tyres. Decided to get Goodyear F1s though at £72 fitted.