Hi, since i changed my oil to 15w 40w, was on 5w 50w mobil 1, my oil pressure has dropped quite abit, i changed to a thicker oil coz when my turbo blew up a few weeks ago, universal turbos recommend that i used a thicker oil to protect the turbo a bit more, so i changed it when i put the new turbo back on,

looking at my oil pressure gauge, when the engine is hot, im not even making 2.8 bar at 2k revs, only just at 3k, the oil pump is geniune ford one only covered 4k miles along with the bottom end, it was making about 3 bar at 2k revs before the turbo blew and i changed the oil.

ive got some castrol rs 0W 40W what i picked up from halfords cheap a couple of weeks ago, not sure about putting that in.

If im using thicker oil i take it, its harder to get the oil about the engine?

also i think im due for a tappet change as a couple are noisey, could this be a problem?

cheers