So quick to bad talk Veggie oil, but afraid to admit that ULSD could cause problems, instead it's the automanufacturers fault.

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I'm not "afraid" to admit anything when THERE IS NO PROBLEM. Get that through your thick skill. I'll have to start calling you RichC.

Probear states that his injector return lines leaked. Those are usually the first to go. So he did have leaks. I also ran biodiesel in my wagon for a year before I had any leak issues. I've worked on several cars that have had leaky gooy hoses from biodiesel. I've seen and worked on cars leaking that haven't touched biodiesel. There are plenty of cars here that have experienced leak problems after ULSD was introduced. That is enough to convince me that ULSD causes leaks, as does biodiesel. If you decide that isn't true thats your choice, but don't call me names because I disagree with you. Either way if it's old age, fuel, or poor design, you still end up replacing parts, so it really doesn't matter what causes it.

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Simply becasue very few people actually replace them every 2-5 years like they should be.

RichC, it sure doesn't take much to convince you unless your mind is locked on something, even if it is false.

What matters is people like you pointing the finger at the wrong cause, blaming a scapegoat instead of the actual cause.

To date I've run my 2000 Powerstroke around 90K miles on various blends, from B6-20 up to B100. The truck has 178K miles, and never a single fuel system problem. When I got my 82 300D with 192K miles, I replaced all the rubber lines because they were old and nasty anyway (under $50 for everything, significantly less than a tank of petrodiesel), filled it full and started running it on day one on biodiesel. Every single tank has been biodiesel with nothing but good results.

In a previous life I was a big truck mechanic, and I learned to swap fuel filters every 10,000 miles, so I have always changed fuel filters every other oil change. The cost of a case of filters pales in comparison to a pump overhaul or replacing a set of injectors.

What I'm attempting to do here is build a case for doing the maintenance you would/should normally do, make the switch, and enjoy it. At work I am usually elected to drive everyone to lunch, because the fuel I burn smells like a chinese restaurant. By the time we get wherever we are going, everyone has a good hunger on.

Next on the plate is a 90 350SDL, and again I will replace all the rubber lines as a matter of course, drain all the confluence out of the tank when I clean the sock, fill it up with BD, and enjoy a vegetarian car. Whether the engine is an early VW, a TDI, my nephew's BMW, a 617, a 603, a 7.3 powerstroke, whatever, I am a convert. Just run the stuff, and you won't be disappointed.

I have also done as techboss and replaced all the rubber lines in my 82 240d and put my homebrew B100 to it with no qualms.
Going on 50k with BD in the TDI and many miles in the Cummins all with zero fuel issues.

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1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily

As FI said, the return hoses on the injectors were probably OEM and well past the original life, in addition to the fact that none of the fuel lines on an 86/87 were Vitron. Original hoses are going to fail, it's just a matter of time.

As to the smoke, I still want to adjust the timing slightly to adjust for the characteristic and burn quality of Bio-D. I think that it's 2 or 3 degrees more advance to make Bio-D burn better.

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87 300SDL - 215K Miles !!
99 F-350CC Dually PSD - 190K
86 300SDL - 189K
All on B-100