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Thread: You are about to take a 10 minute journey...

  
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    EazyDuz's Avatar
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    You are about to take a 10 minute journey...

    Which would produce the best MPG:

    1. Start engine and go, driving normally and following speed limits.

    2. Start engine, let it warm up to operating temperature then go as above.

    I always just go straight off, but i know cold engines uses more petrol and also increase engine wear. So which is the best for MPG if you chose one option to do from there on.

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    buckle's Avatar
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    Option 1 is always better. Otherwise you are wasting petrol with the engine sat on idle waiting for it to warm up.
    By the time the engine has idle'd up to temperature you could have almost got to your destination. Its also not good for an engine to be left sitting on idle.

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    i'd just go, might be different if i had a turbo though

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    I normally start and wait 30 secs to let the oil to get moving

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    1. Idling uses enough petrol each minute, on average (apparently!) to drive 0.3 miles. Never mind it being bad for the engine - the top end is under more load at idle than at 2000rpm+ believe it or not.

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    AdamH-SRi-T's Avatar
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    so whats the best thing to do with a turbo? everyone i know with turbos wit with the engine on for like 10 mins without moving??

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    Start it and drive. As long as you dont boot it it will be fine

    White is the new Black

    FARMYARD TUNING

    LEH IS THE FUTURE

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    I just keep my revs low until the engines warm, generally don't take it past 3k until the thermostate has opened
    Want a professional job done on fitting your aftermarket electrical accessories? PM me for a quote
    Electrical fault finding also taken on
    Located in N/W London HA3, and willing to travel within reason





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    Quote Originally Posted by Adam_Astra_SXI View Post
    so whats the best thing to do with a turbo? everyone i know with turbos wit with the engine on for like 10 mins without moving??
    Guilty as charged

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    I get the car moving as soon as its started, don't like to just leave it idling. Just take it easy for the first 10mins or so to let the oil warm up.

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