What is the reason for Rena's high fuel consumption?

There are many reasons for Rena's high fuel consumption. Let's talk about the common: 1. Insufficient or too low tire pressure will increase the friction between the tire and the ground, increase resistance and increase fuel consumption. Tires are seriously worn and often slip, and fuel consumption will increase; 2. Poor gasoline quality will increase carbon deposition, and too much carbon deposition will make the intake pipe wall rough, affect the intake effect and the quality of mixed gas, and increase fuel consumption sharply; Everyone's driving habits are different, and bad driving habits will also lead to high fuel consumption.