[juanbenae]

you only got 6 quarts out of it? did you drain the oil tank and case? if I recall the 87 you need to possibly remove the entire sump plate to drain the crank case. somebody more familiar than me on that will chime in. you should have gotten at least 9 quarts out of the motor, tank & filter. something seems strange, or it was very low on oil only getting 6 quarts.

I have run 20/50 in all my 911s so the 10/30 could be your issue if in a warm climate. these cars like a thicker oil unless you are in a cold environment. additionally you really should research a couple oil threads on ZZDP (zinc) content in the preferred oils. the newer oils are light in that component and the tappet valves and cams in our cars will suffer w/o it "added". I quote added because it was pretty much always in motor oils but the newer motors don't benefit as greatly from the zinc, and it is harmful to catalectic converters over time apparently so it's all but disappeared in todays newer oils.


do some research and if in a warmer climate get the 10/30 out before the heat of the coming summer. the 20/50 will hold viscosity better when temps are elevated and will help the oil pressure readings.

good luck & welcome