What your car is suitable for oil and gas what grade?   To clarify this issue, we need to look at a simple gasoline label is how to.
The engine work in engineering, a part of the cylinder in the unburned gas mixture, resulting in a large number of peroxide in the condition of high temperature and high pressure, the normal flame arrived, by decomposition and combustion, this cylinder is not ready to work, gas explosion shock wave will directly hit the piston and the cylinder wall, the engine vibration, and a sharp metal percussion sound, this is the phenomenon of detonation.
Detonation not only affects the stability of the engine, and life, and will reduce the power of the engine.   At present, there are 90, 93 and 97 in some areas is 92, 95, and the label and in fact we say gasoline antiknock agent is independent of purity, is different, so in general the more advanced gasoline antiknock smaller.
The gasoline engine with different compression ratios of different working temperature, knock against the requirements are different, the same grade of gasoline engine, the higher the compression ratio, the more easy to produce bigger knock, so each engine manufacturers in the factory are generally marked vehicles for the use of gasoline label.
The general compression ratio below 10:1 engine can use 93 /92 gasoline; the general compression ratio is greater than 10, 95/97 more appropriate recommendations or gasoline
If the user in order to use cheap, low grade gasoline antiknock is relatively poor, resulting in gasoline combustion is not sufficient, resulting in engine knock, power loss, increased fuel consumption, will cause the engine too much Coke, the motorcycle failure rate, it may ultimately The loss outweighs the gain.
My car is low compression ratio of the engine to use high grade oil?   The same is not appropriate, because the cylinder compression ratio and gasoline antiknock mismatch in fuel combustion is not sufficient, so that the engine carbon increase, increase fuel consumption.
Vehicle and vehicle oil shall be the compression ratio, and is not the better label, in order to obtain the thermal efficiency of the engine fully, improving dynamic performance of motorcycle, prolong engine life, reduce maintenance costs, reduce fuel consumption, reduce emissions, motorcycle oil shall be matching with the compression ratio.