I drive a nissan versa 2010 and recently ive noticed my car seems to be using double the fuel. I have been checking under my car for leaks and nothing also when i went for my oil change asked them to check the gas tank and they said it was fine, any other ideas of whats going on ?
Check tyre pressures and check for binding brakes. The easiest way to check the brakes is to go for a run for a couple of miles. Try to avoid touching the brakes, especially when making your final stop. Then check the wheel centres (be careful as you can get a burn if one is binding). They should all be cold.
Just a thought but I had really poor mileage on a jeep and couldn't figure out why, changed plugs, ran some injector cleaner, air filter changed no luck. So I lived with it for a while, about 2months ago on a really cold morning I noticed that the vehicle wouldn't make temp, and as I drove faster the temp actually went down slightly. Default setting on a broken thermostat is "open" keeping coolant moving through the radiator. Changed the thermostat and voila mileage went up.
Just a thought but I had really poor mileage on a jeep and couldn't figure out why, changed plugs, ran some injector cleaner, air filter changed no luck. So I lived with it for a while, about 2months ago on a really cold morning I noticed that the vehicle wouldn't make temp, and as I drove faster the temp actually went down slightly. Default setting on a broken thermostat is "open" keeping coolant moving through the radiator. Changed the thermostat and voila mileage went up.
Particularly if you do lots of short journeys or live in an area of particularly low temperatures. Jazz has a blue light which stays on until the engine heats up (red if it goes over temperature). I don't even put the heating on until my blue light goes out.
giselegadot3 
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