When it sees the contents which to 2002 December 2nd which newspaper comes up with the article, the premium gasoline is quickly diffused with the foreign-made car, the formation car and sports car user increase to be a contents, try to read, it follows in the oil refining industry and the premium gasoline which it makes public from 2001 May wool the income car and formation car sale increased steadily at 2002 and continuously increasing condition they seemed and sale quantity 2001 initial marketing ten time they compared and and above 7 boats they increased continued ratio improvement me and pure me must be an above jade grade car 94 with the fact that in the premium gasoline and the general volatile oil to be a contents, addition they pour, It will be revealing, that the octane of the premium gasoline where the wool is in the process of selling it is 98 it is thin the premium gasoline amount used will increase and it will reach and the gas station water service which it handles the last year 12 place to increase (the capital region 10 places, the region 2 places) being increased to the last 10 end of the month 50 places (the capital region 35 places, the region 15 places) with to be the article, bisects the premium gasoline market of the wool and the company which is different it magnified the premium gasoline handling gas station as well recently and in April 2 place which will come the only handling gas station increased with 10 end of the month current 19 places with the thing to announce, Iss nu the place, Sale quantity initially being 2002 April one month for 653 drums which start a premium gasoline sale to 2002 October increased with 784 drums, it does. It says that also the case octane number of different oil refining company premium gasoline 99 grudge every. The premium gasoline per liter 60~80 prime cost quantity it is more expensive the general volatile oil than but the foreign-made car and the formation car, the spot car user increases and the demand layer does steadily as the tendency which is increased. When the oil refining company field uses the premium gasoline, the occurrence probability of oneth person knocking actual condition in the engine life shortening VIP trembles with the burden the life of the engine only will increase knows with sound arresting of the engine lowly and to decrease that the possibility of enjoying a quite operation it is public information it is doing the place where it is an article, this as the end which comes out from the mouth of the person who does not know the automobile to know and. The automobile is loaded the recent electronic control engine because and it is come into the market from the background which develops the electronic control engine must know. The old-fashioned electronic control engine (khya pu ley sprouted and the vehicle) endurance was not the automobile which considers the anger which is all. By the obd1 regulation which is the possibility as electronic 1 generation of doing but the automobile which is produced the automobile is developed an engine protection in objective, the now when as electronic 2 generation as dividing must do doing, develops by the automobile which considers a waiting environment in obd1 regulation and vehicle make it lives and the possibility of being satisfactory will reach in order to be, the application of the law must produce it receives. With this together obd1 or the automobile of obd2 regulation leads and combustion condition and being an oxygen sensor it watches it is controlling the structure which it is becoming. It is an engine where the role of the case oxygen sensor of the automobile which recent production it sells specially operates very a lot. It is an oxygen sensor to give and by a position condition suction - compression - explosion - exhaust stroke it leads and it does not send with exhaust pipe it perceives the air of combustion gas inside and to send with the ecu and, the ecu by the public performance non- memory of 14.7 large 1 it follows in air quantity is done a fuel quantity revision or the control of the ignition timing revision back and it is because. It will reach and to change it talks and analysis of the gas emission it leads and the fuel is insufficient and when, increases a fuel participle quantity it it controls, that the fuel quantity is many, when it is judged, reduce the fuel to control, it becomes. It is like that the chart oxygen sensor which uses the fuel where the octane number is high it leads and is perceived the air quantity of the waste gas which it perceives and the case knocking where the fuel where the octane number is high in order to revise the fuel will enter the chart fuel which is controlled enters and compared to. It is what is the like that octane number? Inside mote knock me and this shed burnt inside mote knock I am many the thing when that much it is seen that it closes the sheep of combustion as, with the fact that it talks a ratio. By low-end ten residual gas it being to namely combustion chamber it closes the fact that it is preignition actual condition with the ecu which demands a more fuel participle quantity with premium gasoline use of intention to be caused by and, the case public performance rain defective actual condition which uses the premium gasoline occurs and it fixes the public performance rain by the ecu it means that the knocking occurs again. If it is like that it uses the premium gasoline it thinks and is the cause of knocking what and basically to know a method where the method which it maintains the automobile civil official is proper it is. When the knocking compared to will be known the reason which occurs plentifully from the like that foreign nation car or the formation car and the sports car and the place transferring with the fuel which the octane number which will reach is high when the proper civil official is known knows as. There to be cause which the mortar makes the knocking which is more the namely small-sized automobile than separately and the thing to know in order to solve in maintenance company, if requests is not the premium gasoline and it catches a knocking, also the sound arresting reduces, the automobile it is it will be able to operate.