Interesting.... I run B99 most of the time from a local supplier (Glover Oil).

Lately I have been running it in a blend because of all the driving we have been doing. I use the clear style primary filters and noticed them turning black when I started running the Bio in low doses. When it cleared up and most of the fuel lines were replaced I switched to B99 (over a year ago). That is odd. I'm interested to hear the outcome.

Have you removed the screen in the tank (or modified the screen). You said "the fuel hoses were replaced a year ago".... Did you replace the ones under the car at the fuel tank. What a about the rubber gasket at the tank screen.

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AJ

1985 300D (SOLD)