I bought a new 2007 Etec 225 HO, SN# 05187199 . I asked the dealer what oil grade was it set on from the factory, he told me the rep told him XD50 for the first 20 hours then switch to XD100 after, but it's optional. when he went and upgraded the software for the temperature alarm, it wouldn't let him set it for XD50. The only option he had was Xd100. So he called me and told me to run XD100.
I'm confused like so many other people. He told me that based on the engine temperatue, the software will tell you what to set it on.
Any truth to that ?