Mobil 1 in either 10W30 or 15W50 will work fine -- for summer, I'd
definitely use the 15W50. The 0W40 is probably too thin.
The oil filter canister sticks straight down just in front of the
cross-member on the passenger side. You must remove the center bolt
and drop the canister to get the filter out, it's messy. Easy to
reach, though. Make sure you put the filter in right side up, it will
go in both ways and if you put it in upsidedown, you get unfiltered oil
circulating. Spring stays in the bottom of the canister, and the bolt
will too.
Peter