Older engines and modern petrol

In recent times, petrol has been changing and a lot of fuels now contain a product called Ethanol E10 (up to 10%). The reason given for this is it can increase the octane rating of the fuel and also help engine emissions meet air quality requirements. Due to the nature of Ethanol Alcohol, it will attract and absorb water, this will result in a slow breakdown of the fuel in your tank. In fact, the maximum time your car should have the same fuel in is 3 months and you should try to ‘replace’ the fuel in your tank every two weeks. Another feature of Ethanol in fuel is that it can reduce the fuel economy of a vehicle and not only that, it can reduce engine performance to up to 40%. Fuel lines and rubber components are also very badly effected by these fuels, the rubber degrades at a rapid rate this result of this is that rubber particles end up in the carburettor(s) and will block or restrict flow in the jets. Carburettors are very sensitive pieces of equipment and any upset to their settings can have catastrophic effects on an engine. Recently here at the Classic Car Clinic, we have had to replace the flexible hoses on quite a few of our clients vehicles to a more modern fuel line that will tolerate today’s fuels a lot better. Is it worth considering your car’s reliability on the next weekend away or club run…..? Call us now to discuss your requirements……

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