freeman

Does anyone have experience with 0W-30 in winter temperatures of 20-60 F and summer temperatures of 70-100+ F? <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />

Matt Vaughan

I would only use the Porsche supported weights of 0W-40 or 15W-50. We have similiar temps here in Houston.

Bill Gregory

In it's June 2001 bulletin, Porsche lowered the highest outside temperature for using synthetic 0W30, 5W30, and 10W30 to 85 degrees (previously it was 100). The Porsche approved oils for all 4,6, and 8 cylinder engines since 1973 are:

Castrol/Syntec.................................5W-50
Mobil 1............................................0W-40, 5W-40
Sun Oil/Sunoco Synturo Gold...............5W-40
Texaco/Havoline Formula 3 Synthetic....5W-40
Valvoline/High Performance Synthetic....5W-30

Viscosities recommended for the Turbo are 0W-40, 5W-40 and 5W-50.