A 1980 Porsche 911 SC with a 3.0L flat six motor holds about 11 quarts of oil. I would use a nice 20/50 oil. Make sure to check your oil only after your engine is up to operating temp and the engine is running. Don't check it while the engine is cold and off... Brian Minson, Editor Porsche 9 Magazine www.9magazine.com
Porsche recommends the use of Mobil 1 synthetic 0-40 weight.
Use flex seal it comes in a aresol can
You can use 10w - 40 for the Porsche 911 Carrera 3.2 engine (10 ltr)
The 2005 Porsche 911 runs on premium unleaded (required).
The 2014 Porsche 911 runs on premium unleaded (required).
The 2007 Porsche 911 runs on premium unleaded (required).
The 2009 Porsche 911 runs on premium unleaded (required).
The 2011 Porsche 911 runs on premium unleaded (required).
The 2010 Porsche 911 runs on premium unleaded (required).
The 2008 Porsche 911 runs on premium unleaded (required).
The 2001 Porsche 911 runs on premium unleaded (required).