I switch from what ever junk the marina was using to Mobil 1 Synthetic 15W50 (as per engine manual) last fall. This spring (late up here) I noticed that the engine oil pressure was way up. Instead of 40 to 60 psi (depending on rpms etc) I'm between 60 to 80 psi. After a two week vacation it seems to be lower but definitely higher that last year. Overall the engine seems to be running fine (occasional run-on).
I know the viscosity is higher but have never noticed changes like this in other motors when I changed the oil.
Has this happened to anyone else?
Any bad stories? Things to watch out for?