My first thought was also what is meant by "processed WVO" as Convert points out?
I've been using 75% homebrew biodiesel in both my vehicles for the last 20k miles or so and feel very comfortable doing it. I did alot of research and pondering before I invested money in my BD system and before I put the first drop in the tank. So far, so good but I know time will tell. I will be the first to post any problems but over on the biodiesel boards, you'll find many, many happy users. There will always be someone who made a bad batch, put it in the tank and had problems. I am very careful and will test for completeness of processing and will check soap ppm on each batch.
Bottom line, to each his own.
Mark Chapman DP member #653;
1983 K2500 6.2 Suburban, 4" lift, 35" tires, ATS turbo, Banks exhaust/intake, pyrometer, tachometer;
1986 K5 6.2 Blazer, 2" lift, 33" tires, Banks intake, pyrometer, tachometer
1963 wife, one owner, average mileage for the age but in excellent shape, a keeper
1992 daughter, low mileage, pretty, limited edition, but requires some money to maintain
1995 son, sports model, very fast & peppy, time will tell on durability and maintenance costs
"Grease is good"