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of fuel needed, it also dramatically lowers the amount of pollution that the exhaust emits.
With these three engines, the amount of gasoline that is used will dramatically decrease. The problem now is distributing these engines all around the world, and convincing people to purchase cars that have these smaller engines, instead of cars that use gasoline very quickly. Given that cars with small motors that get good gas mileage aren't as popular as vehicles with large motors that use gas quickly, it will take a very long time for people to adapt to buying future gasoline saving vehicles.