1. Under inflated tyres are not only potentially dangerous, but they also increase the rolling resistance between the vehicle's tyres and the road, meaning the engine has to work harder and therefore consume more fuel.rn2. A badly maintained vehicle is unlikely to perform as it's designed to. Problems such as partially blocked filters, poor oil performance, and emissions control systems under-performing will all prevent your engine from functioning properly. This can lead to increased fuel consumption and higher emissions.
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