Thanks for your input rcpattern. I have been advice by Singapore Hobby supplies to send the engine to YS Japan. Going to do that. I hope I read from many other 170cdi users about what percentage oil they use and arrive at some consenses. Agreed that everyone would have their personal fav, but there is got to be some sensible range, hopefully. I am very tempted to go lower on the oil, for number of reasons. One, its easier to clean , 2 oil is in our concern more expensive at this point than Nitro, as we have to import Klotz for our requirement. It's also the reason I waited for the 170cdi. It's not so big a loss now. I would definitely prefer reliability over some loss of power or gain in goop.

Hope to hear from other regulars on their fuel percentages.