oiling issues

The generally accepted rule of thumb is 10psi for every 1000 rpm. So if your car is a street car that sledom exceeds 5000 rpm then 50 psi is plenty. I would certainly give 10W-30 a try.

Some things to consider;

1. 80% of the wear in an engine occurs during start up. A thinner oil will get to the parts faster than a thicker oil so less wear.

2. Besides more load on the timing chain there will be more load on the oil pump and cam gear when running high pressures. The gears usually fail before the timing chain.

3. High volume oil pumps have the capacity to suck the oil pan dry faster than the oil can run back down resulting in lost pressure at high rpm's. That's why a HV pump is not normally recomended unless you are enlarging the oil pan capacity.

4. If you are using the factory gauge in the dash to judge your oil pressure then you really have no idea what the pressure is. The factory gauge is really only good to see a change, they are not at all accurate.