Im wondering what it is Ive heard a little about that 1985 diesels were some of the bes to use for burning Vegetable oil. Is this true? and if so does anyone have some technical specifics as to why.

Thanks

its because they were IDI diesels.Instead of DI diesels.The fuel does not coke them as bad.pre 85 were cast iron also,with cast iron heads.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

My guess is that you heard that from people who own a 1985.
I thought my 617 was the best engine until I got a 603, then a 606, then a 642, etc.

As with almost everything involved in burning WVO, it depends. It depends on a lot of variables.
Most of the variables involve the owner/operator.
The design of their system.
The quality of the fuel they make.
How they use their system.

I don't consider a system, it's use, and user, successful, until the vehicle has gone over 100k with no ill effects. You can just dump WVO into the diesel fuel tank and the car will run... for a while... until it doesn't anymore.

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Greg
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
Previous:
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

The 60X engines are fine too-they're still using a mechanical IP. Common rail engines are a bit more picky with their fuel supply.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

I've got a 603 with 328k miles. Started blending without a kit at 180k, then went to a single tank kit around 240k. I still blend in the winter, but run straight wvo in summer. Engine has held up exceptionally well. Great compression still. The only repair I've made to the fuel system is injector nozzles a few months ago.

With a single tank kit, you have to use common sense as far as the weather is concerned. Also the quality of the oil I have is very good. 100% canola oil, filtered well. Have used peanut oil in the past too with good results. I won't put just any oil I find in it.

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1991 350SDL 350k+ miles