Thanks @carusoam for the reply, yes i search all the internet for a Maintenance manual for the Ovation, and still haven't found, i'll keep looking for it or maybe someone here posted or has it, will search harder.
@StevenL757 thanks a lot for the clarification!, in my country the inspection regulations are simliar to FAA 91, but it says that we should comply with manufacturer anual and 100hs inspection plan. According to that, if there is a 100hs inspection for the Ovation, i should do it to keep the aircraft current, BUT if the mooney service manual says that the 100hs doesn't exist, or something like that inspection only apply to those flying outside Part 91 that would make the trick.
Here are pretty basics in regulations, if the manual say to do the 100 hs we should, but if it doesn't we don't have to.
There is an exception to the rule that says the following: "Anual inspection: it is understood by the one that the Manufacturer indicates in the Maintenance Manuals and that they comply with all the items prescribed in Appendix D of this Part and which are generically referred to as 100 hours; although for many manufacturers this occurs at 150, 200 and 300 hours..."
Regarding oil exchange, 25/30hs will be, of course, and the filter every 2 oil changes.
Thanks a lot to both, and still finding the way to spend money in oil and fuel, and not in mechanic every 100hs
Ariel