When the engine is working, friction between metals will produce metal scraps (especially for new engines), also the reason of incomplete combustion, there will be a lot of carbide or sulfide residuals in the engine. These substances will hinder the rotation of the engine, even erode the metal parts inside the engine and cause permanently broken. By replacing the engine oil, we can remove the impurities and make the engine operation smoother, quieter, and more fuel efficient.

Some people replace it in every 5000 km; some car enthusiasts will replace it in every 3000 km; for some people who believe in the recommendation from original manufacturer will replace it in every 10000 km. No matter how often you replace the engine oil, engine oil is the consumables with functions of lubricating and cleaning. Generally speaking, the interval is about 3000 km in America, and 5000 km in Taiwan. It’s the average value. It’s difficult to tell when the right time is to replace the engine oil just by the sense of sight or touch.

Due to the main functions of lubricating and cooling, the standard of oil volume is quiet important. Too much of oil volume will increase the resistance of the crankshaft, and reduce the output power of the engine. Moreover, the excessive oil will flow into the combustion chamber and cause engine oil consumption and blue smoke. This situation will increase fuel consumption. Add appropriate amount of engine oil on full and lower of the dipstick is the ideal volume.

The engine oil filter core is to filter out the engine oil. Some car owners think that they only need to replace the filter core with engine oil in 5. 000 km, and it’s unnecessary to replace in 3.000 km. In fact, the engine oil filter core and engine oil are both consumables, some of the high quality engine oil are even more expensive than the filter core. It’s unnecessary to save few money only for the filter core. It’s strongly recommended to replace the filter core every time you replace the engine oil for a better filter result.