Originally Posted by Linctex
Originally Posted by Oildudeny
Never seen an inverted mounting base and raised threads
They didn't last long - - - people hated them because they were hard to get started.
Actually you'll still find the same design on all current Fram smaller filter applications including the metric thread 7317, 6607, sae thread 4386, 4967. Also used on the current Fram made Honda A02.
While I'll stipulate to a nitpick, not my favorite design. More exacting line up of filter thread boss required than recessed or beveled design. Most Fram use a beveled type design shown on all their boxes. Makes block thread line up easier especially in hard to see/access applications. It's also why ecores use the auxiliary base/tapping plate. Puts a cover over this design to allow filter base to slide on and line up with block threads.
Topic filter from when Fram had MGL contract. Been seeing a few older date filters posted lately. Agree that filter sitting two months before cutting open, could contribute to cruddy looking dome end. If fill hole doesn't have one of those valve cover baffles Toyota uses on some applications, a look down it using a light might give some indication of actual valve train condition.
Thanks for c&p.