2 QUESTIONS.

[Mike Costigan]

I use a traditional oil - SAE40 in summer, SAE30 in winter - and it will usually take around ten miles before the oil is up to temperature and the pressure stabalises; once there I reckon on around 1psi per 10mph (a bit higher for a 3-bearing engine). I imagine using a multigrade oil will produce slightly lower readings until up to temperature, but probably similar figures once hot.