Porsche Enthusiasts Club Forum

The OPC that last serviced my T (not under my ownership!) used Quantum Synta Platinum 5w40 fully synth which is VW UK's own brand of oil so is what all the VAG dealers use. It seems like good stuff and it's what I use in all my other cars as I buy it from TPS for about £70 for 20l.

But when I service my T shortly I'll be sticking to a Porsche A40 recommended oil, so I'll be using Shell Helix Ultra 5w40 as this seems to fit the bill nicely.

^ I couldn't find any zddp data on the shell so gave it a miss, I know a few people using it here but think they have NAs.

I ran 10w40 mobil 2000 laterly in my 91 turbo after the advice at the very start of this thread, it imo produced the best results for my low, road use. Although the zddp level is slightly on the low side, I saw good oil pressure, reduced lifter / tappet noise and better fuel consumption.

Oil technology has moved on a lot in 20 to 30 years in everything from shear rate to operating stability.
But engine tolerances have also changed. This is such a mine field!

Personally I think if you have got to here and are doing the research then you probably know more about the correct oil needs for the 944 than your local indy or even opc, not so much a specialist. That may sound harsh but from my experience and some posts hear then that is true.

I like to buy my own materials and get our local specialist to fit thing if I'm short of time, not everywhere is cool with that.

Bob the oil guy is worth a look online as well.....

Since posting above on this I've been doing a lot more reading (lots of stuff on the bobtheoilguy site and forums!) and have changed my opinion that a slightly thicker oil is almost certainly the way forwards. l've now settled on Total Quartz Racing 10w50 which is made up of high quality group iv base stock and comes from a company with a very long and successful history in motorsport and seem to be more engineering, less marketing. I can't find any direct ZDDP content evidence, but anecdotally it would appear that their regular fully synth oils have at least 1100ppm and the racing products have more.

It's a fair bit less expensive than the posh ester based oils, which are worth paying for in a race car but not a road car IMO.

http://www.micksgarage.com/proddetails.aspx?pid=1214868

I'll give it a go and see!

But what people need to remember that all of this is being skewed by the CO2 rubbish & fuel consumption elephant in the room.
The very latest cars are running 0W/20 !!!! Sorry but that must make dishwater seem thick!

I've just changed to this oil. Got 10L for £55 from a trusted ebay vendor. No issues with it so far, seems to work well.

Stuart

I'd tend to agree if it wasn't for the potential no.2 big end oiling issue, for that reason I pay a bit more for Millers 10W50 CFS..

Sad to say it would make no difference. The issue is a oil feed one, no oil feed & the bearing is toast, irrespective whether it is olive oil or hand drilled by virgins in Switzerland.

hand drilled by virgins in Switzerland....

man I gotta get me some of that

Sad to say it would make no difference. The issue is a oil feed one, no oil feed & the bearing is toast.[/quote]

My understanding is it's air bubbles in the oil that causes the problem so there is still oil it's just frothy. I want triple ester PAO froth .

Old thread, my first post and it's an oil thread, so taking a risk

I'm keen to make the best choice I can on the engine oil, at the moment it's got Millers 10w40 semi in there, but I won't be happy until I have a fully synthetic that's suited to the older engines. I like the sound of the Mobil 1 10w60 (it would match the sticker in my engine compartment too) but my conundrum is the 60 weight. I don't track the car, just normal road, but it's pre-varioram and it has a lightweight flywheel and I don't want to loose any power or torque due to moving a heavy oil around.

Maybe the Mobil 10w40 semi or a Millers 10w50 ester would be better as the difference in viscosity between a 40 to 60 as already mentioned is huge, but if the difference wouldn't really translate to on road performance, I'd be fine, just need experienced reassurance and then it would be Mobil 1 10w60 all the way, as per Jon recommendation.

I really dont think a thicker oil will make any noticeable difference to power etc

Here's my view : jmgarage are a long respected Porsche expert who take the time to both work on our older cars and also answer questions directly on this forum. When they say "I can now endorse both 'Mobil-1 Extended Life 10w60' fully synthetic and 'Mobil Super2000X1 10w40' semi synthetic as being perfect for our older Porsche models." (see the very first post in this thread), then I'll take their professional opinion, rather than what I can glean from other opinions that you can find if you look hard enough.

I'll caveat with a direct quote from Guy, from Opie Oils (Oilman on this forum) : "Mobil 1 Extended Life 10W-60 is now called 'advanced' but it is the same stuff".

YMMV.

Cheers,
Bryan

I use Silkolene Titan Pro R 15w-50 in my 993 and have for several years, seems to really suit my engine, and I am delighted.

I haven't looked to see if its been mentioned in this thread but you can but zddp as an additive.

Decided on the Mobil 1 10w60, for all the reasons in Jon's orginal post, plus the marketing points put forward by Mobil for this oil are incredibly similar to those put forward by Porsche Classic for their own 10w60 oil aimed at aircooled 911s. There are trade offs, but I have decided to have faith in Mobil, Porsche Classic and JMG too. Oil was changed yesterday and car is away till tomorrow for a remap, so I await my next drive with interest!