Ok, so I only have 100 miles on my system. It doesn't make me all that experienced, but believe me, you need heat for this idea. Never let anyone tell you otherwise. I have a Mercedes 300D, and let me tell you, this is an old debate. These cars will start up and drive around on straight VO without heat, I've tried it and i didnt even notice the transition from diesel. but, but but but, what works now won't necessarily work down the road. Some claim lots of miles on no heat, others claim early and sudden death of their engine. As it's not logically possible to push your luck too far, and be one of the unlucky ones, it's worth the money you spend to put some heat it. And I'm not talking kits or even special parts. You can salvage most of what you need for a good heated system. Or you can spend a measly $400 and make sure your baby gets the fuel she needs to live a long life.
The person in that post said "You don't need a kit" to which I'll add, some people seem to believe and advocate this about Mercedes, but it is not at all possible and stupid beyond belief in any other diesel. Heat please, dont go half-ass, you'll save hundreds on diesel, you can afford it.

It's true that using unheated wvo directly while living in a cold climate will certainly lead to some troubles. But if you use a blend of rug(regular unleaded gas) and wvo you'll be just fine. The blend can be between 10% rug/90% wvo to 30%rug/70%wvo. It all depends on how cold the climate is, colder means more rug (but not more than 30%). I don't know if you can use safely these blends in a new direct injected DI diesels, but in the old IDI mercedes engines they work like a charm.

I say if you wanna do this thing just search around just to save you the $$$ and head ache.

Started running a blend of wvo and diesel 50-50% a week ago. If really cold weather is predicted I put in a couple litres of kerosene. Ambient temperture around -18 to +10 degrees c. Always let my car warm up for at least 15 minutes. Thermostat in the car is a 85 c. Wvo is canola based. I always warm up my car with a block heater for at least an hour before attempting to start it. I have put approx. 1000 km. on it so far, highway and city driving. I live a little bit north and west of Edmonton, Alberta, Canada. I am looking for a combined fuel filter, water remover and fuel heater called a "goldenrod". Truckers in the arctic use them. My brother in law who is a heavy duty mechanic and trucker with experience in arctic recommended this unit. So far no problem. So far this is working for me. Good luck to all!