The alternative to heating your fuel system is to mix BD with petro in some appropiate percentage. I was running 25% BD in our 20 degree temps without any problem. The trick is to place jars of the varying percentages outside or in the freezer to see at which point it gels. Again, as Murphy said, this is another varible that depends on your feedstock.
I've been watching your website develop, Murphy, and I like your step-by-step instructions. Sometimes Girl Mark assumes that the newbies know too much and she (or others) will leave out some critical info, not intentional I'm sure. You might find that link to the tritrating spread sheet someone over on the infopop forum worked up and link it to your website. You plug your numbers and it gives meth, catalyst amounts as well as final cost per gallon once you complete the batch. Very easy. That's the one I donwloaded but I'm not sure where it was on-line. Let me know if you want it.
I just dumped in 25 gallons of BD the other day at about 75 cents a gallon, with petro at $2.75 a gallon around here, that's about $50 I saved or rather earned with my labor. I look at it as a part-time job but really it's a fun hobby that pays for itself.
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"