Re: diesel fuel

Posted by jdemaris on October 30, 2006 at 05:28:46 from (69.67.230.70):

In Reply to: diesel fuel posted by Scott KY on October 29, 2006 at 19:27:53:

There is no absolute correlation between sulfur content and lubricosity. But, most diesel fuel refined in this country - does result in a lower lube rating with low-sulfur fuel. The new 2007 fuel has a minimum lubricosity rating that comes with a general statement - assuring that it is fine for all diesels. But . . . that is based on some metal-parts wear tests where X amount of wear is permitted and deemed acceptable. So - e.g. - your rotary injection pump might have lasted 30,000 engine hours with the older fuel, but might only last 10,000 hours with the new fuel. They are calling that acceptable - but - more important - do you? I figure it is cheap insurance to add lube or use off-road fuel - as long as it retains it's lube qualities - but in some areas - it will not.
The new diesels are using particulate filters in the exhaust system - kind of analogous to catylictic converters - so the older diesel fuel creates the same kind of problem as did leaded gas back when converters first came out. They will plug up.
Most diesel companies have completely pulled out of the car-market in the US after 2007 - since meeting the new specs. is not cost-effective. From what I last read - only Mercedes will keep making a diesel car for all 50 states - and - their car has two fuel tanks to be legal in California - the extra tank carrying a chemical additive that must be injected along with the diesel. For larger vehicles, e.g. SUVs, trucks, etc. - GM has a new diesel that - once again, they are making themselves and they are dropping the Japanese Isuzu Duramax. It is over 300 horse and 500 ft. lbs. of torque and they say it will meet the new specs - but the rest - I think - is still a corporate secret.
If you want to search - there are test-specs ad nausem - about wear over time with different fuels and additives. Seems to me - that the easiest approach is just pick one that has been proven to work - e.g. Power Service.
Many bio-fuels have also been tested - more overseas than here - and many also have lube problems. Overseas, Canola oil is a common additive to bring up the lube quality.

Replies:

• Re: diesel fuel Luke S 08:36:03 10/30/06 (3)
  • Re: diesel fuel jdemaris 10:41:59 10/30/06 (0)
  • Re: diesel fuel jdemaris 10:09:01 10/30/06 (1)
    • Re: diesel fuel Luke S 12:13:35 10/30/06 (0)

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