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  • 1 Post By TDS_7

Thread: Wondering how much fuel evaporates when a vehicle is parked in the sun

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    Default Wondering how much fuel evaporates when a vehicle is parked in the sun

    Hi,

    I was wondering if there's anyone who's experimented or researched the amount of fuel that evaporates when the vehicle is parked in the sun.

    I purchased a Hero Maestro towards the end of december 18 and have been testing it's mileage since. I have completed 1000 KMs and my previous mileage was 29KMPL, which I feel is quite low even after considering the run-in period and newness of the engine. I use the full tank to full tank method.

    Ever since summer has kicked in, I've noticed a further decline in mileage. From 29, it dropped to 20.

    My building compound does not have a shed and I am forced to park the scooter in an open area. Moreover, I work full time and get to use the vehicle only on the weekends. This means the scooter stays unused and parked in the sun through five whole afternoons every week. I use a black parking cover, however the bike heats up considerably under it.

    Given the petrol evaporates under the sun and I am using the full tank to full tank method, I was wondering if the evaporation could be offsetting the mileage.

    So far I only know that petrol evaporates when the vehicle is parked in the sun. However,

    1. I do not know how much evaporates over say one whole afternoon in India or over 5 working days.
    2. I heard some newer vehicles have a system in place than captures the fumes and redirects it back into the engine. However, I do not know if Maestro has such a feature, found no mention of it anywhere.
    guptavis likes this.

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    Default Re: Wondering how much fuel evaporates when a vehicle is parked in the sun

    Thread approved.

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    Default Re: Wondering how much fuel evaporates when a vehicle is parked in the sun

    Quote Originally Posted by xBhp View Post
    Thread approved.
    There are different types of fuel tanks and different materials also , on scooter the tank rest below the seat, also its insulated from direct sunlight unlike a unicorn whose tank is metal and sits atop the frame in direct sunlight. some tanks are made of plastic so that also help in restricting evaporation.

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    Default Re: Wondering how much fuel evaporates when a vehicle is parked in the sun

    I have noticed petrol evaporates and reducing 100ml in 3 days when parked in shed. This is in Honda unicorn and I am pretty sure of the accuracy because I tested the evaporation on empty tank and by filling 1 liter and emptied after 3 days by physically taking the tank from the bike.

    Newer bs4 bikes have mechanism to prevent too much of evaporation to open air.

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