pumpercaptain If you do alot of towing on steep grades, and you have disc brakes, you may be better off with regular disc brake grease. Every year we do a week at Tahoe, 6200' base elevation, and Echo pass to get there is over 8000'. I have a three axle trailer with disc's on two. Every year on the trip home I lose two or more Buddy Bearing rubber caps, and sling grease with the consistency of butter inside the wheels. The counter guy at the local trailer supply store remembered me buying replacements every year, we got to talking, and he informed me marine grease is derived from vegetable oil, and can not tolerate the heat generated by disc's. Switched my bearings to disc brake grease and new inner seals, and stopped the mess. Had my previous trailer for 25 years, allways ran regular wheel bearing grease, never had a failure, or even a hint of a problem. Some of the bearings and races were still the original one's when it was sold.