A lot of cars advocate often like to see engine oil black will decide to whether change engine oil, actually this is not scientific differentiate a method. Decision engine oil maintains of ability is engine oil viscosity, capability of cleanness of engine oil black specification is strong.
So, after all engine oil why black?
Machine filter is dirty
Engine oil filter, say again " engine oil case " , we are daily also abbreviation is " machine filter " . Grain of the dirt that is used in purify engine oil, metal, carbon is sedimentary wait for foreign matter with fuliginous grain, protect engine. The function of machine filter itself decides it is sure is dirty " fellow " , with the machine filter after period of time, can put in greasy filth, the object such as metallic grain. If changing engine oil when, did not change machine filter, so, dirty machine filter is met very quickly a be contaminated of new engine oil is black.
So, had better change engine oil when change machine filter, can make sure machine filter has the effect of filter oil not only, also can prolong the service life of new engine oil.
Fuel quality is poor
We add the fuel with bad quality, the alkene content in benzine is high, criterion in gasoline engine easy form greasy filth; The sulfur content in derv is high, criterion in diesel engine easy form smoke soot. The resultant of incomplete combustion brought about engine oil to blacken directly. The most typical is a tractor when opening the past rapidly beside us, is that black smoke impressive?
So, choose the gas station of big shop sign that pledges in guaranty to cheer, better at car motivation and engine life.
Engine maintains not good at
Start high temperature of pilot time excess load to run, engine and oily base case are not cleaned when the car changes engine oil, and of engine oil filter filter the effect not beautiful, can quicken engine oil blacken.
So, change engine oil when, besides change machine filter, still can do greasy filth to clean to engine, change again the engine oil that character assures.
Drive road condition is brought about
Engine cannot run for long with normal revolution, when driving for example, go to stop, create fuel very easily combustion is not enough, in benzine easy generate greasy filth, in derv easy form smoke soot, bring about engine oil to blacken thereby.
So, if you are in for a long time drive a vehicle of urban a section of a highway, create fuel easily combustion is inadequate, can shorten appropriately oil change course of development.
The clean sex of engine oil is good
Engine oil has lubricant effect not only inside engine, also have the effect of clean engine. So, engine oil of quality goods of choose and buy, the engine oil that quality can assure, kosher sex has compared engine oil of general complete synthesis.
A lot of cars advocate think, it is not easy that engine oil jumps over high-grade engine oil black view is incorrect. Of course, blindly pursuit engine oil is black also cannot take. What should assure to buy only is quality goods and the engine oil that character assures, as to black with not black depend on inside engine dirty.
