The repairman said that pushing up the right bumper of Futian Aoling truck would consume oil, but pushing down is normal.

Does the subject want to ask, "The repairman said that it is normal to push up the right bumper of Futian Aoling freight car, but it is normal to push down." The reasons are as follows:

1. Improper adjustment of the bumper position: too high a bumper position will lead to the slow speed of Futian Aoling freight car, which will lead to an increase in fuel consumption during acceleration. However, if the position of the stop lever is too low, the vehicle speed may be too fast, which will lead to an increase in fuel consumption.

2. Unbalanced engine load: When the right bumper of Futian Aoling freight car is pushed up, the engine load will be unbalanced and fuel will be wasted. Pushing down can balance the engine load and reduce fuel consumption.

3. There are problems with the vehicle itself: If there are problems with the Futian Aoling truck itself, such as improper engine adjustment and worn tires, it will also lead to increased fuel consumption.