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Impact on engine oil performance. Familiar with the oil grade, you can check mark into the DX sat without in the face of various brands of oil confused, but in actual use, we also present the new car bought from a variety of errors, there is an ironclad discipline , change the oil every 7500 Why replace? Oil has changed because the original can not provide normal lubrication cleaning effect, so change! However, it ignores the point that he is against the basic oil SJ reference, in fact, made of mineral oil in the 3000 km after his lubricity began to decline, so we change the oil in the future will hear two different engine sounds, new for Oil apparent sound slide! Because different lubrication oil, good oil tend to make better engine performance and higher fuel economy, use the SL oil per hundred kilometers than SJ gasoline engine oil 1 liter or more provinces, many DX in maintenance time Oil prices are very concerned that the yellow shell than the Great Wall or sauna his special oil more expensive by almost half! ! But the actual use of each maintenance period or yellow protective shell using Ka saves than using conventional oils lower gasoline expenditures of nearly $ 300! ! In addition to the engine oil SJ protection is the use of multiple, same engine, using two different levels of engine oil, engine performance will be in the future one hundred thousand kilometers is a huge difference! This is not something left in the tens of dollars! Replacement: Mineral oil replacement period is recommended is 5000 km; semi-synthetic oil change intervals recommended that 7,500 kilometers; synthetic oil change interval recommendation is 10,000 km;