Okay. I got a new rear tine tiller from menards. Used it once and the gear box oil started boiling and melted the dipstick completely off. Took it back to return it 4 days after I bought it and they won't take it back because it has been used. I know.... WTF??? Right? I'm now stuck with a $500 POS that I'm not too trusting of on the quality side from a company I have spent all day returning my current home projects to. Police were called, it was a great time they will all remember. So question is... What kind of gear oil do y'all use in yours because clearly the crap the manufacturer calls for and uses doesn't work.