rasheed
Well-Known Member
- Posts
- 1,815
- Location
- Bangladesh
Hey fellas, just wanted to pick your brains about something that's been puzzling me for a while.
Out here where I live we have to deal with dodgy fuel quality quite a lot. Its also a common phenomenon that oil in the sump expands, sometimes by as much as a litre over a couple of months if you're not watching it. Leads to excessively frequent oil changes and the allied expense but its almost an unavoidable cost. The mechanics all say bad fuel causes it but can't give me a clear explanation.
Anyone know why this happens? I've seen it in brand new engines as much as old ones. You can eliminate cracked water jacket or HG failure. There's no obvious signs of water in the oil so I don't really know if it is fuel or water that's getting mixed in. Is there a logical reason why bad fuel makes the oil expand and lose viscosity? I'm talking about petrol engines, btw. :confused2:
Out here where I live we have to deal with dodgy fuel quality quite a lot. Its also a common phenomenon that oil in the sump expands, sometimes by as much as a litre over a couple of months if you're not watching it. Leads to excessively frequent oil changes and the allied expense but its almost an unavoidable cost. The mechanics all say bad fuel causes it but can't give me a clear explanation.
Anyone know why this happens? I've seen it in brand new engines as much as old ones. You can eliminate cracked water jacket or HG failure. There's no obvious signs of water in the oil so I don't really know if it is fuel or water that's getting mixed in. Is there a logical reason why bad fuel makes the oil expand and lose viscosity? I'm talking about petrol engines, btw. :confused2:
