Your car needs to combust petrol. And as every GCSE science student will tell you, this needs three things. Fuel, an ignition source and air.
In engines, this is supplied by the petrol, diesel or other fuel source, the spark plugs, and the air is drawn through the air filter, ensuring that dirt and muck doesn’t enter into the piston chambers. Of course – all that filth ends up caught in the air filter, reducing its effectiveness.
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