● Oil Category:
Of oil on the market because of their different base oil can be simply divided into mineral and synthetic oils the two (vegetable output is scarce, therefore does not count). Synthetic oil is divided into: Full and into the semi-synthetic. The fully synthetic motor oil is the highest level.
The biggest difference is that: the synthetic oil used in a wider temperature, a longer period of use, as well as higher costs; same film requirements, synthetic oil can be used to lower the viscosity can be reached, mineral oil is required with respect to the synthetic oil denser viscosity can achieve such a request. Synthetic oil because the period of use in the same work environment, a lot longer than the mineral oil, so higher costs, but after comparing oil changes, not much higher than the mineral oil.
● oil label:
The lubricant's viscosity multi-use levels of identity such as SAE, SAE is an abbreviation of the English "American Automobile Engineers. E.g.: SAE15W-40, SAE5W-40, "W" represents Winter (Winter), and their number in front of the smaller the better the low temperature fluidity of the oil, representing the available lower the ambient temperature, in the cold start of the engine better protection capacity; "W" behind (a cross-back) figures are indicators of oil temperature resistance, the greater the value the better the description of the protective properties of the oil at high temperatures.
(SAE) applies to the ambient temperature (° C)
5W-resistant external low temperature -30 ° C
10W external resistance to low temperature -25 ° C
15W external resistance to low temperature -20 ° C
20W-resistant external low temperature -15 ° C
30 resistant to external high temperature 30 ° C
40 external resistance to high temperature 40 ° C
50 external resistance to high temperature 50 ° C