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She continued: “Of course, there is the added risk of breaking down when you run out of fuel too which is more of a risk if you are only adding small amounts each time.
“For an unleaded vehicle this would just need refuelling but for a diesel engine, it could lead to your fuel pump sending air through your fuel system instead of gas.
“If that happens, your vehicle will shut down and not restart until the air is removed- this process is called bleeding, similar to a radiator at home, and although motorists can find ways of doing it themselves, it is probably a job for a mechanic, meaning even more costs.”
Motorists can also save hundreds of pounds a year by avoiding premium fuels, especially for standard cars.
READ MORE: Princess Diana ranked most influential royal for classic cars
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