Have connected my Onix 8 to my NMEA 2k backbone and getting great data from my Evinrude e-Tech engine fed to the unit. One hitch and wondering if anyone has experienced this or has suggestions. I have an oil tank with an NMEA 2k sender and I know it works because I'm getting an accurate reading on the tank level through my engine gauge (which is fed through the NMEA network). However the oil level is not being supplied to the Onix, or it's not reading it somehow. I've selected oil tank (1) from the set up menu. Have searched around for other options on the menus, with no luck. Suggestions?