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clickman · 01-03-2011, 07:57 AM

If you do a Search you will find MANY discussions on oils.

I and many others have decided to swap to Castrol Syntec, due to the lessening in quality of the Mobil over the years.

Syntec 10W-40 is the preferred weight. Oil change period is also super important, as the recommended intervals are thought to be ridiculously long. IIRC correctly 8000 miles was the recommended distance for that weight, but my memory might fail me there. Your Search should answer that. Here in Canada we can't get 10W-40, so I'm using 5W-40 and have to change it every 5000 miles.

I'm a bit anal about these things, and I wanted to do the conversion to Castrol from Mobil the right way, so on the advice of experts I did a flush using Valvoline VR1 Racing 20W-50.

01-03-2011, 07:57 AM	#2
clickman Registered User Join Date: Jan 2007 Location: BC Posts: 1,312	If you do a Search you will find MANY discussions on oils. I and many others have decided to swap to Castrol Syntec, due to the lessening in quality of the Mobil over the years. Syntec 10W-40 is the preferred weight. Oil change period is also super important, as the recommended intervals are thought to be ridiculously long. IIRC correctly 8000 miles was the recommended distance for that weight, but my memory might fail me there. Your Search should answer that. Here in Canada we can't get 10W-40, so I'm using 5W-40 and have to change it every 5000 miles. I'm a bit anal about these things, and I wanted to do the conversion to Castrol from Mobil the right way, so on the advice of experts I did a flush using Valvoline VR1 Racing 20W-50. __________________ 2001 Boxster, 5 spd, Seal Grey Last edited by clickman; 01-03-2011 at 08:01 AM.