HOW TO ACTIVATE COLOR CHANGE: In order to activate funny coffee mugs the temperature of the hot liquid should be over 70°C/158°F5. At that temperature it is possible for the color of the coffee mug to change.
Cummins qsb3.9 engine is with a small efficiency loss is also avoided compared to two-stroke non-direct-injection gasoline engines since unburned fuel is not present at valve overlap and therefore no fuel goes directly from the intake/injection to the exh