philngrayce
Veteran Member
- Joined
- Oct 18, 2004
- Location
- Connecticut
- TDI
- '02 Jetta, '06 Jetta, Both Gone '13 Leaf, Gone Liberty CRD, Subaru Forrester and MB300SD
I mentioned the low water temp and short purge times, but did not considerthem likely culprits. The oil analysis showed no contamination. Also, it appears he was doing very long trips on WVO, so the percentage of time running at less than full temp or starting on a mixture would be very low.
The grille cleaner does not sound so good, though. I would thnk there must have been quite a bit of it in the oil to wear a hole in the fuel line, and it may have had water and other garbage in it as well. I don't really know, not knowing how they clean out the fryers. Still, I don't think this looks like a smoking gun either. Or perhaps it is chemically changing the oil, along the lines of the acid discussion above?
For those reading this and loooking for general WVO practices, (those who haven't already been scared away) you can't be too cautious with warm up. I don't know much about engine thermodynics (I'm sure someone on here does and is hopefully following this thread), but I think the water hitting 190 is an absolute minimum for switching. I don't know how cylinder and piston temps compare to water temps, but the rest of the engine has a lot of warming up to do after the water first hits 190. There is a lot of thick metal there. I know in the winter, my gauge will hit 190, then drop back one or two times before staying at that point. I never switch to VO until it has stabilized at 190.
I'm sure what you say is right about the PD purging faster, but I remember on my '02, on a cold winter night, if I purged a mile before home the car would start a bit hard in the morning. If I purged 5 miles before, it would start up perfectly. Apparently there was still some residual VO in the plumbing.
I've never really cared for automatic controls, and this is a good reason. I suppose one could set it up so it switches 2 minutes after hitting 190, then doesn't switch back unless it drops to 180. Bu I think I'd still prefer manual control. If others (my wife) were using the car, of course, I might opt for the automatic.
The grille cleaner does not sound so good, though. I would thnk there must have been quite a bit of it in the oil to wear a hole in the fuel line, and it may have had water and other garbage in it as well. I don't really know, not knowing how they clean out the fryers. Still, I don't think this looks like a smoking gun either. Or perhaps it is chemically changing the oil, along the lines of the acid discussion above?
For those reading this and loooking for general WVO practices, (those who haven't already been scared away) you can't be too cautious with warm up. I don't know much about engine thermodynics (I'm sure someone on here does and is hopefully following this thread), but I think the water hitting 190 is an absolute minimum for switching. I don't know how cylinder and piston temps compare to water temps, but the rest of the engine has a lot of warming up to do after the water first hits 190. There is a lot of thick metal there. I know in the winter, my gauge will hit 190, then drop back one or two times before staying at that point. I never switch to VO until it has stabilized at 190.
I'm sure what you say is right about the PD purging faster, but I remember on my '02, on a cold winter night, if I purged a mile before home the car would start a bit hard in the morning. If I purged 5 miles before, it would start up perfectly. Apparently there was still some residual VO in the plumbing.
I've never really cared for automatic controls, and this is a good reason. I suppose one could set it up so it switches 2 minutes after hitting 190, then doesn't switch back unless it drops to 180. Bu I think I'd still prefer manual control. If others (my wife) were using the car, of course, I might opt for the automatic.
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