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EPA regulations only apply in the USA AND they are superceeded by the Mining act and regulating body in both the US and Canada ( most countires in fact its a generaly higher standard )
Very good question.....The local CAT service guy who comes to the mine wants to see this engine too.I asked Hans why does Duetz make a diesel that burns veg oil full warrentyand the best CAT can do is build and engine that wears out before warrenty and smells bad ( he gigled )