50 Weight Oil? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

jmatta · 08-06-2009, 05:13 AM

I second Castrol Syntec 10W40...I've used it, though my usually flavor is Royal Purple (the Castrol is probably just as good and half the cost). xW50 weight oil is fine for warm/hot weather, but I wouldn't run it in winter...too thick.

Brucelee · 08-06-2009, 06:04 AM

Red Line 5-40 is also excellent.

70Sixter · 08-06-2009, 04:09 PM

The Porsche TSB has 0w-40, 5W-40, and I think one (Mobil 1 Peak Life) 5W-50 from various companies. Temp use ranges are listed, as are countries/areas of the world.

I use un-approved Motul 300V in 5W-40.

Some of the approved oils are barely adequate, and some I would not use if they were free. There is a world of advice available.

Use an ACEA A3/B3 or API SL or better. No SM or CJ oils.

Call or e-mail Charles Navarro at LN Engineerin for help/advice.