Adrian

0W 40 Mobil 1 full synthetic.
Full synthetic oil used in the transmission and front differential as well.
Fully synthetic oils were approved for the 964 from 1989. ROW versions were delivered with Shell FSO. US versions were delivered with Dino oil until August 1992.
Ciao,
Adrian
964C4

andrew911

non-synthetic 20W-50. I thought Porsche recommended synthetic for 993 and on...

I really don't think I'll hurt my motor by running non-synthetic. Been using penzoil 20W-50 in my 911's for 15 years now...if I had a 993 I'd use the synthetic if that's what the car came with

axl911

Do you guys change your oil weight depending on temperature, or you run it year round?

Arjan B.

I use a wide range oil, 0W40 oil from Total [France] Same specifications as Mobil 1 0W40. Good stuff, good oil pressure, lower fuel consumption, clean engine.

I would advise Mobil 1 for everyone. the extreme hot countries will need a 10W60 or a 15W50 oil because of the hot climate. Europe is a great area for 0W40 oil.

Kahdmus

I just bought a case of Mobil 1 0W40 a few weeks ago as they had it for the first time at my local auto parts. Wondered if I should stick with the 5W30 due to occasional hot summer temps (its generally fairly cold here in Pacifica and in San Francisco where I work however)?

Tom W

Howard, I use 15-50 and not lower 0-40 as our temps with lows in the 40's during the winter really don't require a lower viscosity oil. The high temps of 100 or more in the summer (especially at the track) warrant the 15-50. [On the coast where Howard and I live the avg high temp in Jan is about 58 and the avg high temp in July is about 68 - but if you go inland summer highs of 100+ are frequent. It does not frost or freeze here.]

Adrian

I used 5W 30 and now 0W 40 all year round. We had our hottest dummer in decades last summer and I was stuck in a number of traffic jams and the oil cooler system worked perfectly and I had no hot oil problems at all. In winter when it drops to -15C no problems starting and oil heats up reasonably quickly.
By the way for those who seem to think that synthetics are not associated with 964s then please read the Technical Service Bulletins issued from 1989 onwards. Plus keep in mind all 964s except American ones were delivered with synthetic oil, Shell actually.
Ciao,
Adrian
964C4

Kahdmus

So Tom, you think its too low and I should get something with a higher viscosity? My oil usage actually seems to be less at the moment too!

Tom W

Howard, no not too low - just fine for normal Bay Area driving. However, I would change it before going to someplace like Thunderhill where the track temperature is often 100+ and you are pushing the car hard.

Kahdmus

Thanks Tom, looking forward to seeing you at a BAR drive again sometime soon!

Tom W

Haward, BAR drive on the 24th. We'll have Robin Sun visiting (he's the guy who does RSR Mufflers for 993s and hosts a great 993 web site).

a964man

I use Castrol RS 10W 40 as recommended for our older cars by My local OPC!

JAMES J

And.....I use Mobil 1 15-50.......used it in my 300ZX Twin Turbo which ran
rather warm....lived in so. cal. hot in summer...no problem's oil is good!
Now i live on the central coast.....15-50 work's fine so far. If you Have a
leak already it will leak more so with full synthetic.
JJ

emilios

I use Mobil 1, 0-W50 for winter and 10-W40 for summer. Very happy with it so far.

Best regards

Emilios

burgass

I use Castrol TWS 10W-60. It was recomended by the Porsche Center.
Has anybody used it?
I wonder if I should change to something else...
Cheers