As I’d really like it if my engine didn’t leak, I’ve used Permatex gasket sealant on all sealing surfaces and around the heads of the oil pan mounting bolts. The original oil pan used special gasket washers under the mounting bolts that had fallen by the wayside at some time in the past, leaving my engine with just two out of fourteen. Since I couldn’t find these anywhere on the Internet outside of a complete engine-rebuild gasket set, I sourced 6mm copper crush washers in their place along with new 6mm x 40mm socket head cap screws as the original ones won’t work with the new oil pan. Has to be socket-head cap screws; hex head bolts will just sit on the outside of the oil pan as their head won’t fit into the counterbores in the oil pan. Needless to say, all this required many trips to the hardware store and much Internet research. You’re welcome.