Quote:
Originally Posted by Petecomplete
As 997_996 says, when Porsche's developed their "classic" oil for the 986, they chose 5w50. Probably has to do with age and wear of these engines in general now. A lot of 0w40 and 5w40 oils are still on the approved list of porsche. The most important is choosing a A40 approved oil, next is choosing a quality oil that has some proven performance over time.
A 0w40 oil should still be fine, allthou It is said to avoid the mobil 0w40 because it shears and looses viscosity quickly. I choose mobil 5w40 instead with some ceratec added. I suspect other 0w40 oils like castrol is higher quality.
Mobil does have a 5w50 oil now with porsche A40 spec. The Mobil 1 Peak Life 5W-50. I'm running a low temp thermostat which lowers oil temps and live in northern europe, so I will stick with 5w40 unless it starts consuming oil.
Got my car back from the indy now, and they used Castrol 0w40. I will run with this until next oilchange.
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i don't understand how a low temp thermostat allows lower oil temps, isnt it just it just go wide open sooner on the warm up ? I imagine low and regular temp thermostats are both fully open when car warms up after first 5 minutes no ?