Too much sulphur in fuel is not good for the engine oil, and causes the formation of sulphuric acid, this could possibly cause higher than 'normal' wear. A simple way to counter this is to use an oil with a high TBN (total base number) or change with the usual oil more frequently.
A way of countering contaminated fuel is to use a sedimemter to spin out cak and water close to the fuel tank (LR make one), and for diesel that doesn't produce the power (low cetane number)or if using heating oil (!!) - get some cetane booster additive and put it in the fuel at every filling.
Andrew.
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