Biodiesel and the CDI

[WOOCHOW]

Does anyone have any experience with BioD and the CDI? I have the opportunity to purchase a 55 gallon drum of B-100 to use for blending with petrodiesel but don't want to run into warrantee or driveability issues. All opinions are appreciated. Thanks.

[VLayton]

Genuine ASTM D6751 Boidiesel? If so, MB suggests up to 5% D6751 bio with 95% petrol is ok. Willie Nelson goes 20-100 in his CDI, but then again, he can afford a new CDI every week, so I'm sure he could care less about what it may do to his car or warranty. :rolleyes:

[WOOCHOW]

thanks. 5% seems a bit weak. I was thinking closer to 20%. I'll have to give it some consideration.


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[lkchris]

Your injectors have seven holes each and fire twice per combustion event and the fuel rail is under 23,000 psi pressure.

New V-6 diesel piezoelectric injectors will have eight holes and fire five times per combusion event.

Mixing french-fry grease with this kind of technology seems dubious at best.

[WOOCHOW]

with all due respect Mr. Christensen, the "french fry grease" to which you refer is known as WVO (waste vegetable oil) which is quite different from a virgin product produced soley for the use in an intermal combustion engine. There may be hazards with using this fuel in a CDI, that is what I am trying to determine, any helpful posts in the future would be appreciated.

[lkchris]

The helpful post came from Mr. Vlayton who quoted Mercedes' specifications.

That should be end of story.

[Alex]

WOODCHOW,

Kent's post was helpful, in that it partially explained the nature of the problem.

"french fry grease" though technically inaccurate, is just as good a term for use on this subject. Better even, because it's not acronymned or abbreviated, and we all know what it refers to.

If you want to preserve the fine CDI engine in that beautiful car of yours, you'd better listen up to M-B folks around here other than the "green" ones who, I gather, put you up to your current folly.

It may well be that in 10 years CDI engines will be built to run great on B100 fuel, but not today. Experimenting on a very old engine of an old car that has seen better days is one thing. On a new one it's folly, indeed.

[WOOCHOW]

Thank you for all your postings. It seems that I will be abandoning my "folly". It seemed a cavalier notion at first, but with the information I've received from this board as well as others it does seem rather silly to pay more to use fuel that is potentially damaging to my car. Thanks for the insight. Hello XOM!