Well it started out with a new bike, first service at 600miles, then I decided to change the oil at 3,300 miles in the November to get any filings out that may be floating about and having new oil for the winter lay up. Comes to March for the first yearly service I had got 3,800 and another oil change by the dealer. Now I am at 5,800 and 6 months later the bright red oil has turned slightly dark so I am going to change it again. It's almost become an obsession, partly to do with the red oil I use changing colour which I know is quite normal, and not wanting too used an oil in the sump over winter. Does anyone else change oil every 6 months. I know I will get some flack over this but I feel satisfied after I have changed the oil. £10 for the genuine filter and £7.50 per litre for the oil. I will do it while I can afford it.