I have a few questions regarding this process as I would like to do myself and want to be sure not to screw something up. On the fogging oil is it correct that you spray down the spark plug holes and in the throttle body? (And this will not hurt any sensors etc.?) Also when changing the oil what is the best oil to use on the 4-stroke supercharged ski's? I have a 2004 GTX 185hp and a 2006 RXP 215hp and have read on forums that you are not to use fully synthetic oil. Please PM me. Thanks