Any super high temp food grade greases out there. Needs to run at a constant 300*C (572*F) all day long. Right now we're using Shell's highest temp food grade rated grease and we're going through 2 tubes a day, turns to water and ends up on the floor. Shell is going to try some custom formulations for us but the cost associated with that is <span style="font-style: italic">very</span> prohibitive. An "off the shelf" grease that meets those specs would be ideal. Any hopefulls out there?