Fuel/water separator filter turning black

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(09-06-2020 )Chamberpains Wrote:  I always liked running bio diesel in my cm870. It liked it. It ran better and fuel mileage got a bit of a boost. I haven't had a chance to run it in my cm871 yet. Im expecting poor results from what you guys talk about it in them.

If you got along well with a particular fuel in the past your 871 will likely perform the same as your 870. I’ve always experienced a few tenths less mileage with bio but the cost per mile always makes up for that plus some. It’s harder on filters as well as fuel lines though. The methyl esters that dissolve the fatty acids attack rubber too.