suspect piston ring or valve clearance on my peugeot 106

[Bill in Houston]

I think their sulfur level has been lower for quite a while, but we are catching up. And I think their cetane requirement is higher as well.

[cleanspeed1]

I was thinking about how the cleaning properties of the ULSD fuel. I know with my older trucks I had to change filters quite a bit because of what it was doing to the fuel system and was thinking with the OP that flushing the system with some regular fuel might clear up the problem.

[Bill in Houston]

<shrug>