Air Filter
One of the most common reasons for a drop in fuel efficiency is a dirty intake filter. This will decrease the amount of air entering the cylinders of the engine resulting in incomplete combustion. Check the filter regularly to ensure that it is clean.
Spark Plugs
Ensure your spark plugs are in good condition. Renew the plugs and wires at intervals specified by the owners’ manual. This will keep all cylinders firing properly resulting in higher efficiency.
Lube Oil
Change the lube oil at intervals specified by the owners’ manual. Use the recommended oil only especially in newer cars. Use of an engine flush before changing the oil will help to get rid of a lot of the dirt that collects in the engine that a normal oil change will not remove. On older engines it is advisable to use an oil treatment agent. This basically thickens the oil which creates a better seal between the piston and the liner, preventing blow past and consequent loss of combustion pressure, resulting in higher fuel efficiency.
Exhausts alter fuel efficiency
Most cars have special sizes for the exhaust. When cars are reasonably old the silencers has to be changed. The garage people always try to fit a size that they have in the garage itself, which might not be the exact size recommended for the car. The wrong size a bigger or smaller silencer size effects on the MPG of the car and the HP of the car. It may be cheaper to put another size than your recommended size for your car but on the long run it will cost you in many ways, especially on fuel consumption. Always put the recommended size of the exhaust that is indicated in your car manual because the car company knows how to optimize the performance of your car.
Concluded
