This information came to me by way of a site for British sports cars, since our tractors use the same type tappets it may or may not affect us. Perhaps someone has some experiance with this. It has to do with high wear of camshafts do to lack of the ZZDP additive.    <!-- s:?: --><img src="{SMILIES_PATH}/icon_question.gif" alt=":?:" title="Question" /><!-- s:?: --> 

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  Mel