ProLine: RightGrease^TM the grease for your gearboxes compare LGB 51020 at MSRP 13.99)

This grease outlasts many other lubricant products on the market. You need to grease your engine's gearboxes regularly, but you also have to clean them from the old grease. Over time the grease combines with dust, abrasive materials and regardless of the mount of grease in the gearbox your idler gears will wear out quickly. Also be aware that you shouldn't over grease your engines either. Too much grease eventually may get in between your electrical motor contacts, and now you have a sluggishly performing engine.

The grease comes in a convenient tube of 2 oz.