Best engine and transmission oils for 964

[Steve Rance]

Gentlemen. I remember an interesting thread regarding the best engine oil for a 964. Can't find it anywhere. In its absence, what is the best engine oil to run in a 964 - some track work. I run motul sport ester 5w 50 in my Metz engines but am aware that older aircooled engines may require a different formulae.

I also use Millers for my transmission in GT3's and intend to use this in my 964.

All advice appreciated

[stuartj]

Hi Steve, I’ve always used Mobil 1 Motorsport in my 3.2 Carrera race car and EP90 LSD spec gearbox oil – albeit gearbox is 915 rather than the G50 you’ll have on the 964.

[Orangecurry]

What's a Metz engine?

Anyway - depends how much track work? In what climate?

Hot climate and/or prolonged tracking I'd be tempted by a 50 weight oil, otherwise I believe it was designed for a 40 in our climate.

(You can have your own arguments/discussions on start-up weight)

If you change the oil far too often (like me) then mineral oil will perform just as well - obviously fully-synthetic will break down slower when stressed (so that's on a track day) but you'll probably change oil either just before or just after that? So again it depends how stressful your particular track-days are.

With the 964 you also are in the 'do I need an older formulation of oil' due to lower ZDDP levels (yawn) in the modern formulations of oil.

A few years back I decided to move to Mobil 2000 X1 as it is a very good 10W40 that is still manufactured to the older formulation, i.e. ACI SL/SJ with the higher ZDDP etc levels.

http://www.opieoils.co.uk/p-6361-mobil-super-2000-...

I used to use Motul 8100 X-cess 5W40 fully synthetic, but they 'upgraded' the formulation to an API SM a few years back which has less of the older-style lubricant elements (ZDDP).

Also I was starting to see some slight weeping with the 5W40 that has stopped with the 10W40, but your opinion may vary on that.

Edited by Orangecurry on Saturday 27th February 13:33

[William10]

I use millers racing oil CfS 10w 60 Nt. for the engine, millers Crx 75w 90 NT

Do your own research on the above oils and get some advice from. Millers.

You may not need the Nanotechnology in your oil

I can fully recommend the oils for use in a 964 porsche

[Jamie Summers]

I've been using the Silkolene Pro-S 10-50 for the past decade or so in my 964s, but have recently switched to the Millers Nanodrive Motorsport 10-50. Lots of others I know have started using this too.