By "bio' you mean WVO, right?
I have blended before, I wouldn't suggest going to the 1:1 extreme.
I think it COULD do 1:1 but it would definitely be a bit on the hard side to start, especially on the cold mornings.
I was adding around 20litres to a tank without much issue (could notice it on the cooler mornings). Definite +1 to BBQ fumes from the tailpipe too =)
I moved away from that as I wanted to ensure no (or as little as possible) oil was left in the injectors to cool and possibly cause problems with carbon, or coking buildup etc.
With the immediate switching of the 6port pollak there is a certain level of contamination anyway - few hundred mls - whatever is in the supply lines and IP.
Another thing, WVO isn’t such a straight forward conversion on these ‘new fangley’ electronic injection diesels. The fuel // viscosity and quality, everything the sensors, and injectors run on – needs to be up to a much tighter spec.
Haven’t heard either way, so can’t comment, but I would be wary.
I would be interested to hear of any results!!
Probably would have to do a better job of heating every drop of oil and the lines, blah blah. Too hard for me; that’s why I opted for the 300tdi over the td5. =)
David
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