Oil quantity for ''6'',those without a front cooler, getting various confusing answers ??? Options

[porschetub]

Stock 914/6 is 7 litres ,have trawled for answers and have had 8.5,9,10 quarts and some running even more but think that's for 911's,I think the 911 tank is larger judging by the 2 I have.
I currently run 7.5 litres because I have larger oil lines and so called larger ''upgrade'' filter,just feel it should be a little more.
I can't trust the oil level on the dipstick because it is a PMS one and my tank is stock 914/6,I kinda feel this filler neck/dipstick is for their aftermarket tank (IMG:style_emoticons/default/confused24.gif) .
A US quart is more than 1 litre so I'am thinking of running 9 liters total ,don't want to overfill it for obvious reasons but would like to be over to read the dipstick engine running on level ground.
TIA (IMG:style_emoticons/default/beer.gif)

[wndsrfr]

With this much oil volume in the system, it will expand when hot, so be sure to be checking with the engine running and hot. There's no way that we would be starving the system with 8 or more quarts in it, and if you're on the track you don't want to be sloshing it into the vent, so I lean toward having just about 1/2-1 inch on the dipstick, no need for more in my opinion.

[porschetub]

With this much oil volume in the system, it will expand when hot, so be sure to be checking with the engine running and hot. There's no way that we would be starving the system with 8 or more quarts in it, and if you're on the track you don't want to be sloshing it into the vent, so I lean toward having just about 1/2-1 inch on the dipstick, no need for more in my opinion.

Thanks John,always check it warmed and running,got you on the oil getting down the vent, reason for being a little cautious.
Will add more and report back (IMG:style_emoticons/default/beer.gif) .