Quote:
Originally Posted by SuperGeek
I thought part of the problem was that the USA was moving aggressively towards ultra low sulfur diesel and that fuel could cause damage to older style diesel engines/emissions systems. Or do I have it reversed? I remember reading somewhere a couple years back not to use one type of diesel in the wrong diesel engine.
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Sort'a. U.S. ULSD (D15 - 15 parts per million sulphur compounds) does not have the lubricity that LSD (D200-500) has, so it can damage pre-2007 diesel injector pumps and injectors, which are fuel lubricated. If a proper additive is used to replace the lubricity, there are no other ill effects except for a slight loss of engine power. If LSD or off-road diesel (D500+) is used in a 2007 or later it can damage the new emissions equipment. Reducing sulpher (SOx) in diesel fuel is a prerequisite to allow other emissions equipment to reduce NOx.
This is a North American thing - the Euros have had laxer requirements on both SOx and NOx control, but that will change with EU-5 and D10. Canada has had diesel smarts since 2002, but the pre-'07 engines were designed to run on Euro "City Diesel" (D50). D50 has 3x the sulphur as U.S. D15, but it is reasonably close relative to D200-500. For longevity, I'd be inclined to use an additive.
Even though non-taxed, dyed, marine diesel (D500+) is readily available, I choose to use clear ULSD with "Stanadyne" additive in my sailboat's auxiliary engine (a 1988 Mitsubishi K2AS).