the profit season 1 episode 5 High compression ratio if choose low grades of gasoline engine, can make the cylinder temperature rises, the incomplete combustion of gasoline, strong vibration machine, so that the output power down, damage to the parts, fuel consumption and driving. If lower compression ratio engine with high grade oil, can appear "delay" phenomenon, namely the compression ratio is less than the highest point of spontaneous combustion, as will appear incomplete combustion phenomenon, the engine is no good. The optimal combination of benefits and risks is the best combination of benefits and risks. If the benefit is certain, the risk is minimized; No a couple can be very alike. One person will enjoy outgoing activities while the other would like the actions that one can pursue in your own home. Even when you are looking at friends, we have to comprehend that most the friends that individuals have may also be different. Friends themselves have different tastes and incredibly different likes.