What oil are you using over there? - There seems to be some variation in the UK over what to use. I currently use Mobil 1 0w40 but am thinking of going slightly thicker as its drinking the stuff.

Is anyone using 15w ? what lasts longer?

Regards
John

England

 

Mobil 5W50

 

Pentosin 5w-40.

 

'Drinking the stuff" is no reason to use thicker oil. Oil consumption is
not a problem, it's a symptom, if anything. If you have a flesh wound,
your first thought should not be blood thickeners so you don't have to
mop as fast. Some 'loose' motors perform for many years, consuming
more oil than a tight one. You may have no problem except an extra
Latte's worth of oil expense a month. Or you may need a top-end rebuild.
No one knows yet, but in the meantime, earplugs are good for when you
have a rod-knock.

(stick to what Porsche recommends and relax in that respect)

 

Same here.

 

0W40 in winter, 0W50 summer and track season.

 

i ve tried 0/40 all the times...and 5/40 a few times...With 5/40 the engine seems to run more smooth...

 

I run Motul 15w50 in mine.......

 

Do a search in this and the rennlist forums. Some of the best Porsche
turbo tuners and engine builders have stated unequivocally *not* to
use any oil that is thicker than Porsche recommends. Viscosity is liquid
friction. You don't want pressure, you want flow. The better made the
motor, the thinner tho oil used. F1 motors use 0-weight oils, and they
actually toyed with using *water* for a time.

 

We run Motul 300v Power 5/40.. We have always had great luck with this oil in abusive road race conditions.. I run this on both our 996/997 daily driver / weekend warrior cars..

MIke

 

Joe-Thats why I have asked though as engine builders and tuners do not seem to have a concensus. Some say don't go past Mobil 1 whilst others swear by other products Some say dont go beyond 5w whilst others seem to be runninng about happily on 5, 10 and 15w.

I hear what your saying and I dont mind paying for Mobil 1 0w40. For the amount of miles I do per year it doesnt make much difference, but does it matter?

Porsche state that the maximum oil usage is 1 litre per 600 miles or so -yet some users seem to get thousands of miles per litre whilst others get consideraby less.

If the engine was so finely tolerenced shouldnt we all get the same? Assuming nothing was wrong with the engine.

Black 911- did you notice any difference with 15w?

Thanks for the interest
John

 

same here motul 300v competition 15w50. run it for better protection, but doesn't mean i change oil less freaquently.

point taken on thinner oil but that's the recommendation for stock cars. Not sure if that logic stands, but this is what I use, happy with it. Asked a dealer mech about it and he replied while company policy is to recommend is X, we use thicker on some cars as well.

 

What about tuned TT's where inevitably the forces on the oil film are considerably higher??

Will the 40 or 50 viscosity be sufficient to ensure a proper lubricant film strength under full load? I hope yes, because I'm not bold enough to try a 10W-60 when I will mod my engine..

Flow is important, but film strenght is important too.

 

100% correct!!

You can't possibly tell that the car is running "smoother" on 5/40 oil, sorry.

 

I have been running 10w40 royal purple.