Question: what is the difference between 10 ppm and 50 ppm diesel?
Answer: Diesel of 50 ppm causes less wear and tear and so prolongs engine life. The more sulphur that fuel contains, the higher the chances are of engine wear and tear. Lubricants containing additives can help combat damage caused by sulphuric acid, but these additives are exhausted more quickly when 500 ppm diesel is used.