In diesel fuels, a portion of the sulfur content combines chemically with water during the combustion process to form sulfurous and sulfuric acid. The result is corrosive wear that eventually leads to component failure. TBN (Total Base Number) additives in the lubricant protect against high levels of sulfur content in fuel. It is important to know the sulfur content of the fuel because over-inhibiting with high TBN lubricants will result in premature deposit formation. High TBN lubricants are more expensive as well
Sulfation
As engine oils continue in service, combustion gases combine with the oil resulting in the formation of acids that are corrosive to the surfaces with which they come in contact. Sulfur in fuel may cause the formation of strong sulfuric acid. Alkaline additives are used to neutralize this effect. The reserve alkalinity or the remaining ability of these basic compounds to neutralize acidic compounds is measured by the total base number (TBN) of the oil. Sulfation correlates inversely with TBN.
使用高含硫量高的汽油或柴油,當這些汽油或柴油燃燒後,汽油或柴油中的硫化物與空氣中的水氣結合後,會腐蝕汽門裝置及汽缸壁,造成引擎用久損壞,所以適時的更換機油及選用適當的機油,可以減輕此引擎的腐蝕現象發生,延長引擎使用壽命
High sulfur levels in fuel, when combined with water vapor, can also cause corrosive wear on valve guides and cylinder liners, which can lead to premature engine failure. The use of proper lubricants and correct oil drain intervals helps combat this effect and reduces the degree of corrosive damage
使用含硫量高的汽油,也會損壞含氧感知器使用效能及壽命
There is evidence that in some instances, sulfur in gasoline may degrade the performance of oxygen sensors, which may also result in high emissions. High sulfur levels in gasoline may also impair the performance of OBD II systems on some vehicles.
In diesel fuels, a portion of the sulfur content combines chemically with water during the combustion process to form sulfurous and sulfuric acid. The result is corrosive wear that eventually leads to component failure. TBN (Total Base Number) additives in the lubricant protect against high levels of sulfur content in fuel. It is important to know the sulfur content of the fuel because over-inhibiting with high TBN lubricants will result in premature deposit formation. High TBN lubricants are more expensive as well
機油產品的TBN總鹼價越高,機油的成本也越高,售價也越貴
現在製油製程有改進,大幅降低汽油及機油的含硫量所以換油里程可以延長
