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Old 08-12-2019, 02:47 AM
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OM603 wvo winterproofing

Hello, i have a w124 with a 3.0 diesel engine that i drive on wvo. So far i have driven on wvo for about 2years and 50 000km, the only time i haven't driven on wvo is in the winter, but this year i would like to try. Right now the only modifification i have on the car is a heat exhchanger. I have bought a new battery and a starter last year and changed the glowplugs. Right now if the car has only wvo in the tank i have to crank the starter some time for it to start, if i add about 5l of diesel then it starts normaly. Now what could i do for it to start better and heat up faster during the winter time (winters in Estonia go down to -30C).

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Old 08-12-2019, 06:06 AM
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Have a look at this thread.
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Old 08-12-2019, 10:25 AM
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Location: Buffalo NY
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How cold does it get in Estonia? As it gets colder, the oil can solidify and then it won't pump any more, and you've definitely got a problem then.

I've driven an OM616 motor on old fryer oil in the northern US winter, probably as cold as 10-20 F so maybe -6 to -12C with no issues, but it was a 2 tank system, with a heated tank and lines for the fryer oil. Start the motor on diesel, switch to oil when warm and flush with diesel before shutting it down.

The first motor in it had wicked blowby that only got worse, the second one was OK.
A friend of mine drove a W201 190D with an OM602 motor on just straight fryer oil, and would switch back to diesel when it got 'too cold', I never did determine how cold that was. I did notice the little heat exchanger that heats fuel with hot coolant right out of the head on my OM602. That, of course does you no good till hot coolant is coming out of the motor though.

What fouls the rings or hone is usually a debate about WVO burning, and partial combustion from starting with cold WVO comes up at the top of the list.

Look up this guy who uses the name 'John Galt' on biodiesel and WVO forums. . What this page talks about is a system to separate the fats out of WVO to lower the pour point- the lowest temperature it still pours at.

He says he lives in the extra cold part of Canada and burns a diesel/vo mix all the time. I think he keeps his motor under an electric blanket in the winter.

Best of luck!

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Old 08-12-2019, 10:35 AM
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Location: bristol,tn
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had a problem one time at 0f degrees.I ran half wvo,half diesel. I had to add 2 gallons gasoline to get it liquid again.
make america suck putin again
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Old 08-12-2019, 12:30 PM
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Originally Posted by moon161 View Post
He says he lives in the extra cold part of Canada and burns a diesel/vo mix all the time. I think he keeps his motor under an electric blanket in the winter.

Best of luck!
Electricity to keep a diesel warm in winter is a neglected / hidden cost of operation regardless of the liquid fuel used.
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Old 08-13-2019, 07:32 AM
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Join Date: Sep 2008
Location: Monteagle, TN
Posts: 306
I add 5% unleaded to my regular 80% WVO 20% diesel blend in winter to help with cold starts. I usually start adding the gas once temps drop below 40F and run it till they stop. I still need a block heater to get going once things get below 20F. One tank system, no heat exchanger. Been running this way for 12 years and 200K miles so far on a 617.
1985 300 TD 448K
1984 300 TD 278K

1983 240D euro 240k
1994 f-250 idi turbo 330K
1986 f-350 IDI
1987 F-350 IDI

1985 JD 1050 4wd
1965 IH 3660
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Old 08-14-2019, 12:06 PM
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Join Date: Aug 2009
Location: MN
Posts: 1,227
This conversion will run WVO down to about -20 degrees F.

1991 350 SDL Conversion to WVO

Keys to success:
WVO heated to at least 160 degrees
Complete purge of WVO from engine compartment fuel line before shutdown
Keeping diesel lines, filters, and tanks, free of WVO contamination.

2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

2007 ML320 CDI .. / 2005 E320 CDI .../ 1998 SLK 230 .../ 1991 Daihatsu Rocky
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