Hi Everyone just changed the oil on my tenere, purchased a large 20 litre container of Silkolene 10w40 Workshop oil last year, its the stuff a lot of bike shops put in there bikes. reasonably priced at around �70.00. i was told at the time it was semi syn, however i emailed silkolene and have been told its a Mineral Based Moleculary converted Base Stock oil which has characteristics similar to synthetic oils.[ what a mouthfull] so guess its just a Mineral oil, so is this stuff ok for the Tenere? funny enough saw a massive drum of this oil, in my local yam dealers workshop and one of his blokes told me Quietly, that this goes in everything at services. bikes only done 500 miles but been left standing all winter so thought id change it.