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    Are there negative effects of changing from petrol to LPG and back?

    What are the possible negative effects of changing from petrol to gas and back to petrol?

    Answered by CarsGuide
    12 January 2024
    David Morley

    A dual-fuel (LPG and petrol) car that is set-up correctly for both fuels should have no problems switching between those fuels. That's particularly so for modern cars with electronic engine control which can be tuned precisely for each fuel, rather than the old-fashioned method of achieving a compromise tune to make either fuel work.

    The reality is that most dual-fuel systems actually start the car on petrol before switching over automatically to LPG. That allows of easier, faster, cleaner starts before the car switches itself over to the cheaper LPG once it's running. In most cases, the driver doesn't even feel this happening. Next time you start the car, it will use the same strategy so, in effect, a dual-fuel car is constantly switching between the two fuels with no harmful side-effects.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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