I've just got my new motor installed and running in my 71 Capri and I have a few questions. Unfortunately, my usual race crank had too much clearance so I installed a used crank that was still at standard clearances. My mains are at 1.5 to 2 thou and rods are about 1 thou.

Motor is running fine with Unocal 20-50w dino oil but oil pressure after running the engine for 30 minutes and water at 200 deg F is 55psi at 1000 rpm. My last motor was closer to 25ish psi at idle.

I'm wondering if I should run thinner oil?

2nd question, has anyone run synthetic oils in the 2.0 or 2.3 motors? I've read in several places that syn oils weren't recommended due to the cam and follower setup.