In 312 miles of testing, the SuperTruck returned the near-10 mpg figure with a gross weight of 65,000 pounds. Some of the other statistics associated with the truck's efficiency are even more eye-opening. Consider, for example, the fuel savings of a truck that achieves 54 percent better than usual economy.
He said that the yellow dot on the tire is supposed to line up with the stem in order to help the tire be balanced correctly. Sure enought 3 tires were improperly mounted and had good size wheel weights on them. The other was properly mounted and had just one small wheel weight.
These types of problems can be hard to track down, and itâs best to wait until the light is ON when you visit your mechanic. Donât turn the engine off when you get there, leave it running and let them immediately hook up their machines if possible. Things that do not help turn off a yellow check engine light are: 1  Changing the engine oil. 2  Changing the air filter. 3  Adding fuel additives to the tank.