My owners manual on my New Gehl skid steer calls for "Mobil DTE 15M or equivalent which contains anti-rust, anti-Foam, and anti oxidation additives, and conforms to ISO VG46" Problem is I cannot find it anywhere, Napa, Auto zone, ect. my dealer only has it in bulk. I would like to know what is the equivalent in other brands. Anyone got any ideas on this?. Also I checked The Mobil website and DTE 15M is not even listed. Maybe the manual is outdated? Does it REALLY matter, or can I just do as my friend does and just use Hydraulic oil of any kind. Any opinions would be appreciated.