Just picked up some Castrol GTX3 oil for my first oil change on the VTR250. I know it isn't a motorcycle specific oil, but after reading the opinions expressed on these forums as well as various pages dotted round the web I thought it would still be suitable. I'm just double checking before I do the oil change that it is indeed suitable for the bike. Its a 15W-40 mineral oil with no friction modifiers (as determined by no claims of decreased engine wear or similar). My only real concern is that in the owner's manual it recommends API SE or SF grade oil, while the GTX3 is API SM/CF. Anyhow, let me know your thoughts and recommendations. I've still got the receipt and the bottle is unopened so I can get a refund if it is not suitable. Also while we are on the topic of oil, where is the best place to pick up an oil filter for the VTR250 round Sydney? Looked in K-Mart but only found one filter suitable for Honda bikes, but it was only for the V4s.