Hi Has anyone tried using a good quality deisel oil in the RT engine, a forum for kawasaki cruisers has a lot of pleased riders using this type of oil in the US, its a lot cheaper, I used it in my cruiser and had no problems, most said it made the engine run quieter, something I could do with because I find quite a bit of top end hi pitched rattle, made worse I suppose by the body work, I just have to wear ear plugs if I do not have my full face visor on. any idea's before I do the next oil change would be great. hear is something to think on, I leased a new no mileage turbo deisel Citroen, when I asked them if it required a service in a few weeks, they said no, the first service is at 20,000klm I covered 8000klms in six weeks no problems, so why are bikes having so many services and throwing away perfectly good oil, cars in Europe have for years been covering 10,000 miles between servicing, and some of their bikes are the same. in Australia it can be 1,500klm 6,000klm 12,000klm I take the perfectly good oil out of the bikes and put it in my PT Cruiser no problems, just a thought WHY. all the best Don