What is the reason for Pentium b50 1.6l fuel consumption per 100 kilometers 12.9L?

Pure urban automatic transmission 12 oil, high-speed 8 oil, for reference.

First, the air intake, fuel injector and throttle are too dirty, which is also the most common reason for the increase in fuel consumption. To solve this problem, it is possible to clean these parts regularly;

Second, oil circuit failure;

Third, circuit failure, these two reasons are also relatively common;

Fourth, the spark plug is broken;

Fifth, the ignition coil is broken. These two reasons may lead to a cylinder of the engine not doing work, or insufficient work, and the engine power will be reduced. Many careless car owners feel that the power is insufficient, and it is likely that they will slam on the accelerator for a long time, and the fuel consumption will naturally increase;

Sixth, the computer injection time is incorrect, which causes the engine to spray large oil when it should not, which naturally wastes fuel and of course increases fuel consumption.