a*******t
发帖数: 891 | 1 "If your car requires high-octane gasoline and you habitually use regular gas
because the engine exhibits no sign of knock, you’re outsmarting yourself.
Most modern, computer-controlled engines include a knock sensor that detects
knock and retards the ignition timing, causing the spark plugs to fire
slightly later in the cycle. This typically prevents abnormal combustion and
knock, which allows vehicles specified for premium fuel to run on lower-grade
gasoline if it is all that’s available. Whil |
|
