* Different engine design. The new engine may have a different design than the old one, which could affect its fuel efficiency. For example, a turbocharged engine will typically get worse mpg than a naturally aspirated engine.
* Increased horsepower. If the new engine has more horsepower than the old one, it will likely get worse mpg. This is because more horsepower requires more fuel to produce.
* Heavier vehicle. If the new vehicle is heavier than the old one, it will likely get worse mpg. This is because more weight requires more fuel to move.
* Different driving habits. If you drive the new vehicle differently than you did the old one, it could affect its fuel efficiency. For example, if you drive the new vehicle more aggressively, it will likely get worse mpg.
It is important to note that not all new engines will get worse mpg than the old ones. Some new engines are designed to be more fuel efficient than the engines they replace. However, it is important to be aware of the factors that can affect fuel efficiency so that you can make informed decisions about your next vehicle purchase.
