wmo/diesel winter blend

[skibarefoot]

I am currently running wmo at 50/50 with diesel. Do you guys running wmo need to thin it more as the temps drop?

[cantrellc123]

I am also at 50/50 with no known problems. I can tell a difference between how it runs at 30 degrees or less vs. over 50 degrees. Maybe a little more sluggish during acceleration and a little less MPG. I might eventually cut back to about 30% WMO once Jan. gets here.

[ta5150]

I run 90% or higher. But I am not using wmo, because I got a huge supply of free used atf and used hydraulic fluid. I used to run wmo, it worked fine, too. So far every type of fuel I have used runs the same, no performance loss, no added smoke. It has gotten below freezing here at night, still works fine. I have a heat exhanger between the stock lift pump and the stock fuel filter. I also add opti-lube xpd fuel additive, 1/4 ounce per gallon. I always start and shutdown on 100% pump diesel, because starting cold on oil means spinning the starter for like 20 seconds, then getting a big puff of smoke.

Based on my experience, and what others have written here, I think that having a heat exchanger makes a big improvement. I haven't had any problems in over six months of running 90% or more of used oil.

[ReefBlue]

Does it even get cold in Georgia? It was 10 degrees here the other morning, I was running a 50/50 mix and it took 3 attempts to start the truck.

Plus I have one hell of a pump on the truck in order to move that cold oil.

[arthurgoboom]

ta5150, what sort of heat exchanger do you have? fuel to coolant? fuel to exhaust?

I thought about figuring out some way to preheat the fuel across the exhaust manifold, but haven't got around to it yet. I'm nervous about running 50/50 in the wintertime, since I don't have a heated filter housing.

I am also going to start carrying a little water bottle half filled with my fuel blend, keep it in the bed so I can visualize how thick the fuel is getting at the current temperature.

[skibarefoot]

During the days the temps are not bad down here. Over night they can get down to 20 and 30 and sometimes in the teens. Since I work nights the truck sits outside getting cold soaked.

I posted this question because the truck starting running rough when the temps dropped and had a miss. A new injector driver module cured the miss but it still runs rough. Pumping out the wmo/diesel mix and running start diesel did not fix the rough running. Once I get the truck running right again I will experiment with wmo/diesel mix again.

[ta5150]

arthurgoboom-

I have a coolant/fuel heat-exchanger. It also has a 12v heater in it (basically a glow plug) with a temp sensor that turns on when it is below 180 degrees. I bought it off of ebay. It also has a fuel filter on it. They are still for sale on ebay, just search for "fuel heater" and look around.

I might try throwing a water bottle of fuel in my truck bed, that sounds interesting.