As the title says, what do you all think is a good WVO/RUG blend ratio? One of the most common I have heard people tell me about is 4 gallons of WVO to 1 gallon of RUG (in other words 20% RUG). That sounds a little high to me.

The previous owner of the car used a 40% WVO to 60% D2 blend in a single tank and did not have any issues. Since it worked for him, I have been doing the same and have not had much issue either (just a few clogged filters from time to time). Anyway, I would like to start using a good blend with RUG to thin out the WVO in preparation for the coming cooler months, granted on the SW Washington coast it doesn't get colder than the upper 30's most of the time in winter. Also, I'm thinking if I use a good WVO/RUG blend, I might not need to buy some injection line heaters (aka. Fattywagon) after all.

Thanks in advance for any advice/experience.

Glenn

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)