[NHRABill]

Well I don't know about -30 but on the other end of the spectrum I use what someone previously posted Standard pennzoil wheel bearing geese in my cars and trailers doing the standard packing of the bearings with the palm of my hand. I do this on my race car and on the trailer to bring it home never an issue I have friends big into off roading and they swear by it axles and bearing breaks are a way of life in 4x4 land. look elsewhere for a mod is my opinion reliability and safety should be the 1st considerations on such an important part.
If you don't agree then drive a trailer with a car on it and have a bearing go on a curvy mountain road. I change trailer bearings every 2 years regardless now(before I sold trailer). Bearing buddies are a nice add to a trailer also On a daily driver car I would stay stock, seen as the 1st set of bearings lasted over 100k miles you may need to change it 1 or 2 more times if you are lucky ...