Looking for a suitable alternative to this lube for the auger gearbox on my 4 year old Ariens Deluxe snowblower. "Suitable" means something I might already have on hand or anything else that might also be useful in my vintage 1985 Troy-Bilt Rotottiller. Presently I have some Mobil1 75w-90 on hand. I've found one other forum thread saying that Ariens L3 is just a 75w-140 EP gear oil, but it wasn't what you might call "well sourced." I should probably also mention that the Troy-Bilt calls for a yellow metal friendly lube.