Quote:
| Originally Posted by C4ENG Here is straight from Cat..
At low load you have low cylinder temps (not to be confused with water jacket temps) which then causes there to be un burned fuel. Un burned fuel will then enter the oil through blow by which every engine has and even more so at low load becuase the metals or not at there expanded rate for best seal. Fuel in oil now.. besides thining out the oil.. fuel has sulfur in it. When sulfur meets water it creates sulfuric acid (there will always be some condensation taking place in your engine for there to be water inside) Now you are throwing sulfuric acid all over the inside of your engine to create corrision and pitting. That's when they showed pics of pitted cylinder linings and bearings of low load running engines.
But then there is the additive in oil to combat and nuturalize the acid which is called TBN (total base number). Cat sells kits to test your oil TBN becuase when that aditive is used up it is no longer combating the acid. You may need oil change sooner than recomended according to usage but who ever wants to change sooner? That's when the problems arrive.
At rated suggested loads the cylinders are up to temp and almost completly burning the all the fuel. |
Great info.......good to know.