If I run a blend of Diesel and WMO in the main tank and switch to the greasecar system once heated up, is this going to cause and issue? What is the issue with WVO and WMO, does it gel?

Making Translucent WMO Blend Diesel Fuel

I read this a long time ago but if I remember correctly, this guy had trouble with precipitate/gelling and coking of injectors in very short time when mixing WMO with WVO.

However, if you are just purging with WMO, mixing would be minimal and there would be no precipitate in the tank since they're not mixed. I'd say you'd be fine but I don't have any first hand experience.

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1984 300D w/ 370k mi. daily driver
1994 7.3 idi non-turbo 180k mi.

yes he's right it seperates and causes thick jelly where the seperation line is.I run wmo only if emergency,and at 25%

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt