I bought a fresh rebuilt 1969 engine from a reputable person who also
installed it. He also added an oil cooler. I always ran 20W50 in my old
engine but he reccomended 10W30 for the first 500 miles on the fresh rebuild.
I picked the car up and the engine pulled like a freight train. The oil
pressure was at 50lbs and I made my way home. I got about 25 miles from where
I bought the engine and the pressure dropped to just above 25lbs at 70MPH. It
stayed at this level for the next 60 miles. When I came to a stop at the
exit, the pressure was just above 0lbs. When I accelerated it went back to
50lbs and stayed there while I ran 70mph until the next exit. It then dropped
back to near zero.
The car never ran hot and no unusual engine noises were heard.
Any ideas on the cause and a remedy? Could it be the 10W30 is just not heavy
enough for sustained high speeds (60-80mph)? Any help would be appreciated.
Thanx.
Flynshoot
Flynshoot@aol.com
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