Cutting WMO with gasoline for winter? - Diesel Forum

arthurgoboom · 12-29-2008, 05:59 PM

Has anybody tried this? I have heard mention of some guys doing it with vegetable oil, but none for WMO yet.

If anyone has tried it, what kind of percentages did you run?

cantrellc123 · 12-29-2008, 07:38 PM

Are you using 100% wmo? I would think at least 40% diesel and 10% kerosene would be a much better way to thin the WMO. I currently am at 50/50 WMO/diesel 300 to 400 miles south of your local. If the temps start to stay below 40 degrees for several days then My plan is to drop to 30% WMO as there is a difference in how the truck runs when that cold.

arthurgoboom · 12-29-2008, 11:40 PM

I was up to running 66% WMO (remainder diesel) in the summer, but I backed it down to 50/50 for the colder weather. I just figured if I had to go much lighter than that on the oil, it's not really worth the hassle to bring diesel home in cans and add it to my mixing/filtering rig. The gasoline would thin the oil much more efficiently, and probably make it burn a bit hotter which would be nice in the cold weather. I just wondered if anyone had done it before. I'm not sure I want to be the experimenter.

cantrellc123 · 01-01-2009, 10:29 AM

I mentioned this to a guy who works with me who drives a 78 Mercedes diesel. I have not read the owners manual for that car but he said Mercedes does recomend using gasoline in cold weather. Once we are back to work I will get the owners manual from him and post that info.

44swamper · 01-01-2009, 04:25 PM

I am at 25% oil now in florida. When I have stale gas I just put it in. I have never put more then 1 gallon in when doing 50/50 though. it helps thin it quite well.

TonkaThunder · 01-03-2009, 11:15 AM

So if you cut the WMO enough you dont have cold start issues? Cuz I have 0 degree mornings to contend with right now

ReefBlue · 01-04-2009, 01:36 PM

I just use more diesel. 50/50 gets me started in the morning, even at about 10 degrees, but it does take a couple tries.

I thought adding gas (RUG) was a big no-no anyhow.

cantrellc123 · 01-06-2009, 04:03 PM

1978 mercedes diesel owners manual.
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At very low temps the fluidity of #2 diesel may become insufficient due to parafin seperation. If winter diesel is used, there will hardly be any malfunctions at outside temps reaching as low as +3 F(-16C).
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Varying with the temp, add a certain quanity of kerosene,if only #2 summer diesel fuels or less cold resistant winter diesel fuels are available or if temps drop below +3 F(-16 C)
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If regular gasoline does have to be added, its proportion should not exceed 30%. Premium fuels are not to be used.
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Even at ambient temps of less than-8F(-22C) the proportion of supplementary fuel (kerosene) must not exceed 50%.
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The adding of supplementary fuel to #1 diesel is not recommended even at low ambient temps.

Reference Table------- #2 summer diesel ---------------supplementary fuel
__________________________________________________ _kerosene

+32 to +14 F ----------------50%---------------------------30%

+14 to +5 F -----------------50% --------------------------50%

jski55 · 01-13-2009, 08:44 AM

Quote:

Originally Posted by 44swamper

I am at 25% oil now in florida. When I have stale gas I just put it in. I have never put more then 1 gallon in when doing 50/50 though. it helps thin it quite well.

Have done the same. Have never gone above 10% though. And usually its just a gallon i have used.

shorthair · 01-14-2009, 05:57 AM

I run50% WMO in the winter & if the temps drop below 30 I'll add 1 gal RUG per tank to stop gelling works fine down to -15*.