Just had my 48,000km service done by my local friendly dealer. When I looked at the bill for $425 I noticed that there was no item charge for front fork oil. I called the dealer in question and asked if the front oil had been changed. He said the mechanic that serviced my bike wasn't on duty but would ask him if he changed the oil when next returned to work. The dealer phoned me this morning and told me that the front oil hadn't been changed at either the 24,000/48,000km service as per the manual and that they only the change front oil when a seal blows. He then went on to say in general use it doesn't really need to be changed and that there are many bikes out there that have never had the front fork oil changed. He also said that if I bring the bike back in they would change it for me for an additional $120. This brings a few questions to mind. Has anyone that has had a front fork oil change noticed any difference after towards? Is it worth it? If I take the bike back for a change should I also get them to change the seals as part of the course? This is a difficult question to answer, but in general how long do fork seals last? I don't want them to change the oil now only to have a seal blow 5,000km later.