That was pretty much my answer to his question in the first place. Then he told me when he blends, he lets the mixture sit overnight, and then when he filters it again and pours it in the tank, the top 2/3 of the mixture is very thin but the bottom third gets nearly as thick as the original filtered WVO he uses.

I told him I suspect for some reason his WVO is settling a bit after the RUG is added. I also told him the W123 fuel is drawn from the bottom of the tank, so now he is worried that after a couple days he is starting the car on cold thick fuel.

You may hear from him on here soon as I directed him to the forum. He calls himself Cusbear.

Glenn

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)