The number of cars on the road is going to nearly triple by 2020, causing a need for greener and more efficient vehicles. To meet this demand, new types of engines and fuels are needed to make cars more fuel-efficient. The key idea is that as more cars are added to the roads, it's vital to find ways to use less fuel per vehicle for a cleaner environment. This study suggests that the future of cars should involve innovative engines and fuels to make them more eco-friendly and efficient.