WizPorsche944

What Weight Mobil 1 do you think is best to run in my 944 in the winter ? Ive been using the 15w50 year around and maybe that isnt a good thing.

michel944

I'd go with 5W30 or 40.

944CS

don't use a 30 weight, run either 5w-40 or 5w-50 synthetic. If you still hear lifter noise on startup when it gets to be really cold, mix in some 0W-40, but I would not run straight 0 weight off the bat

Tenacious_G

I run 15w-50 without too much trouble..

yellowline

0W-40 is what the factory recommends for all newer Porsches (944s included), and it's what I use in winter.

Luis de Prat

Mobil 1 5W-50, if it's available in your area.

ccaarmerciill

I have used mobil 10w30 in my previous two oil changes... my next one will be before a cross country trip in early feb. Any suggestions for the 3,000 mile hike?

orcadigital

Everything i have always been told is run as thick of oil as you can that still allows the motor to turn. It has to get pretty cold for 15w50 to get that thick, and will you be driving it when its that cold? I run 10w40 in my truck, and 8 below (22 below wind chill) it was slow crank, but started...

ausgeflippt951

I don't mean to come across as a *****, but threads like these come at least every two weeks --

DO AN EFFIN' SEARCH!!!

Again, no offense to you personally intended; it just gets on the nerve to have to repeatedly answer this question.



But to alleviate the need to search, run 15W50 or 20W50. DO NOT RUN 5W30 unless you live in the arctic. Being in PA, run what I said above.

marky522

And who are you to say what EXATLY to run??? there is no need to run such a thick oil if your engine is not worn out, What i plan to do is run the 0w40, that we use in all current p-cars, and if i notice lower oil pressure under when the engine is warm, I will bump up from there. There is really no need to run such a thick oil unless your engine is worn out/high miles. All you are doing is robbing yourself of HP.

Mark

orcadigital

I guess it depends on your "needs".

Thicker oil = better protection.

Thinner oil = better hp.

The other issue might be how often you change your oil as well. As a chemist once explained to me, multiweight oils with a larger differential (% not fixed weight) were more prone to breakdown, especially in higher horsepower engines. Thus a 10w30 was better then a 5w30 in wear characteristics (the oil wear, not engine wear), as its a factor of 3 vs a factor of 6. I am speaking in general terms of oil, not specifics to the 944. I run 15w50 in my 914 race car, and will most likely run the same in my 944 for the above reasons (it has 5w30 in it now, and not leaking).

Aviator

Well, I just moved to Wyoming to ski for the winter from Pennsylvania, and I put in 5w30 and it takes a long time for the oil pressure to begin to drop when warming up. No lifter ticking or other think oil noises, but I've usually used 5w30 in the winter for other cars. It's been getting down to the low teens at night and in the high teens and twenties when I start up. I still feel it's too think on start up as I need to help it out with gas on really cold mornings. I dread the thought of oil shear on the top end too. I'm going to switch over to syn. on the change this weekend and go to 0w40 M1 and see how she likes that. The 5w30 right now after warm up is around 4.5 bars on throttle and 2.5ish idle which I am happy with. But I really think it needs a lower visc. for start up in these cold temps.

edit: She ran just tops in PA on the 5w30 for the 4 days before I did the 2,200 mile trip out west. Same pressures and no noise on start up. 143K miles on her now and the engine has always been well taken care of by the PO. The drive west on that oil was fine including up to 10,000 feet and hi revs, never below about 2 idle and 4 on throttle hard. Before that I was running 10w30 in Pa and that too was no prob.

Z-man

I use Mobil 1 15W50 year round in my 944S2, but in the winter time, I only take out the '44 in warmer, dryer weather.

If it is too cold, the thicker oil works a little harder to coat everything, especially on cold starts and if you park your car outside overnight.

-Z-man.

cruise98

+1 on Mobil 1 0w-40 for european cars is the only Mobil 1 that is Porsche approved. Check the back of the bottle. It is approved for ALL porsche cars produced since 1973.

There are some others that are Porsche approved like Elf, but it is mail order. Castrol Syntec has one weight that is approved also.

bendavis2

IF you want an interesting insight into oil for your older car, take a gander at this: http://forums.pelicanparts.com/showthread.php?t=367300

It's 30 pages long, and pretty intense (also written around the topic of air cooled 911's. But the info is still very valid.

I won't use M1 0w40 again, even if it is recommended.