My 9 month old TBTS is due to change for filter at the third service. I wanted to fit a K&N filter to my bike. The service station won't allow me if i ask them which one should i go for and the local mechnic is not aware of the K&N filter. In this case what should i do should i go for K&N filter or should i not, if yes then which filter model should i buy? will it be plug and play or will i need some tweaking. Also found that the Mobil 1 Racing 4T is a 15W50 API SL JASO MA type of engine oil that can be used in TBTS. Has anybody used this engine oil and should i go for it? again service station won't allow me if i ask them cause they have tie up with Motul and the local mechnic has tie up with castrol activ xtra 20W50