On the oil from Germany, that would have been me. It appears that it was more of a one-time favor than something he can do often....and since I received two one-liter bottles of the correct oil, I have not had the opportunity yet to even break the seal on either of them--go figure......=).
I think suduramaxde is fortunate that he uses and alternative and has experienced relatively few problems so far, but he HAS had to get into his motors, so time will tell....Sid also appears to me to be very conscientious in his maintenance practices, perhaps more so than the average guy has time or desire to be......
To me, that the oil is relatively expensive and appears to be a series of "gouges" from the manufacturer to the end user, is a distraction that in the end only costs a guy big bucks for motors, a painful lesson to learn that there is not always a good work-around. Even more maddening is that regular maintenance with the correct stuff is no guarantee against failure.
My advice, unsolicited, is to change the oil religously every 500 hours, get the CORRECT OIL from Bobcat or an alternate source, and forget about using something else.
I know, it is a grudging matter, but better to buy the oil kit grudingly than motors.