Low Sulphur
Low Sulphur
(OP)
In the UK we have Ultra Low Sulphur Fuel
http://www.greenergy.com/products/petrols.html
http: //www.wipo .int/pctdb /en/wo.jsp ?KEY=02/18 521.020510
The feature of the invention is that the use of a low sulphur fuel enables the amount of anti-wear agents containing phosphorus such as eg ZDDP to be halved without any adverse effect on the antiwear performance of the lubricating oil.
Is the fuel quality a major player in the general ZDDP reduction for anti wear?
http://www.greenergy.com/products/petrols.html
http:
The feature of the invention is that the use of a low sulphur fuel enables the amount of anti-wear agents containing phosphorus such as eg ZDDP to be halved without any adverse effect on the antiwear performance of the lubricating oil.
Is the fuel quality a major player in the general ZDDP reduction for anti wear?





RE: Low Sulphur
S contributes lubricity to gasoline and diesel so it's reduction would be expected to increase wear severity in engines. However, it also places stress on the oil when combusted, so that could help oil performance. The patent appears to report that the reduction in lubricant stress outweighs the loss of fuel lubricity, at least in the engine stand test.
As fuel quality is changing significantly in many markets and engine oils are becoming more highly tuned to applications the oil companies are aggressively researching fuel/lubricant interactions, and in some cases with surprising results.
As the patent alludes, there are non-P-containing antiwear agents so ZDDP is not irreplaceable technology. It is however highly effective and very cheap, so choosing suitable substitutes can offer significant competitive advantage.
RE: Low Sulphur
both the latest US and EU specifications now call for socalled lowSAPS oils - oils that make it possible to treat the exhaust gases further then hitherto possible with conventional oils.
RE: Low Sulphur
The lubricating oil compositions used in conjunction with the ultra-low sulphur fuels in the present invention are suitably Group II, Group III or Group IV basestock as defined by the API and are preferably Group II basestock.
Why would Group II be preferred?
The stepwise reduction in Fe levels from test 1 to test 2 to test 3 may give the impression of a gradual decrease in severity over time., However, current knowledge of engine testing would not support this. Furthermore, the test engine was not new at the start of this study and thus had been fully run-in in earlier test work.
Engine testing results may differ - do UOAs provide a complete picture despite being repeatable and are the factory fill oils specifically designed to provide lasting protection for the engine life?
RE: Low Sulphur
Knap, the following link may help to answer your question:
http://ww
RE: Low Sulphur