I agree my engine is nice and tight with 65K miles and no burning of oil between 2500 mile oil changes. I use 20/50 weight oil and when warn it runs at about 50 psi and then at about 75 psi at speed.No fits of dyslexia. Mabe you guys just have loose engines
From the 2L engine book on 15/50 weight oil:
Engine oil pressure, warm @ 800-900rpm 7.1 - 14.2 psi
Engine oil pressure, warm @ 5000rpm 49.8 - 71.1 psi
. The only time my OP light comes on is on is when ignition on, before start up. Start up, the light goes out. Light has never come on at idle on a hot engine even using 15w-40.Bottom line, IMHO, is that in a mid-service life engine you should see hot oil pressure above 5 psi (warning light extinguished) at Idle and about 50 psi above 2000 rpm or so. As the engine gets towards overhaul, you'll see that 50 psi value perhaps drop a bit. 50 psi is pretty high compared to the spec of many engines. I feel that you'll have little problem with oil pressures as low as 30 or so at hot running.