EVOMMM

i went on mobil 1 web site and for both my cars 1988 M3 and 1988 944 turboS 0w40 is the listed oil I should use i have 12jugs/ cases of red top mobil 1 syn at home
how fast oil is changing i cant keep up i am confused now

dillon410021

I use that over the cooler seasons like winter. I make it a lot easier for the car to turn over and start.
It says on the bottle that its like a european blend which make since because Germany isn't the warmest place in the world

333pg333

....erg.....

KuHL 951

Oh noes...another oil thread on the way. 0W-40 would destroy my car in Summer but you're welcome to use it and tell us what your oil pressure gauge says on a hot day above 95 deg. in slow traffic when you come to a stop.

DanR

I use mob 1 for the track but use 15-50W, On a hot day at the track 0-40 is too low in my humble opinion.

2bridges

the lifters in particular in these cars don't like the thin oils.
I won't run anything under 15-50

gregeast

Just my experience but I started running Mobile 1 0W-40 over the winter, replacing M1 15W-50. The 0W-40 provided noticeably easier cold starts and much smoother idle during the cold weather (Colorado). I also observed decreased oil consumption. I've continued to run it over the summer and have noticed no difference in oil pressure on hot days, both at idle and while driving on the street, between the 0W-40 vs the 15W-50.

I would agree however that it's probably too thin for track work, the car ran plenty hot on 15W-50, wouldn't want to know what it would be with the 0W-40.

I'll make no claim to be anything remotely close to an oil expert, but as I understand it, the '0W' part of the rating indicates cold temperature viscosity. At operating temperature (100 C), 0W-40 has the same viscosity as 10W-40, 5W-40 or even straight 40 weight oil. Here's a link to a good article that describes it in fairly straightforward terms. Motor Oil Viscosity Grades

So, at operating temperature the discussion is then between 40 vs 50 weight...

(Can't believe I just jumped in on oil thread, fool!)

944obscene

15-50? I guess you'd want to watch your RPM until the car warms up then. Bet that would cut down on my oil consumption too. I currently use 10w40 (I think.. Bah, gotta go check).

P.S. If it's domestic oil (I.E. made for the U.S. market) then AVOID Mobil, as a general rule. I've looked into it, and they have a couple good oils, but for the most part, I've veer'd from them entirely. Search other oil topics to find out why. Hint- lack of actual lubrication!

bearone

multigrades are the best of both worlds, good starting in the cold, reasonable protection unless it's real hot.
when it's nice and cold pour from a 40w can and then from 0-40, which flows faster?

"0-40 made for better starts", no big surprise there.
15/50 is a joke in colorado winters, i'm surprised it even started.

i grew up in denver, graduated from east high and dealt with cold as low as -25 and live in phx where it's real hot.

87951
95sl320 dd

rdanford

I too am in Colorado and run Mobil 1 0W-40 from Oct - May and then switch to Mobil 1 15W-50 from May - Sept...only need two oil changes a year with the miles driven...this has worked great for 10 years now....it's all depends on where you live and how you drive...just my $0.03

seattle951

I ran M1 0W-40 year round in my old 924S in Seattle for 4 or 5 years. Car ran great the entire time.

Prior to 0W-40 I had tried 15W-50 M1 and got a lot of valve train noise during startup along with a red oil light. Once the car got hot, it was fine on 15W-50. I don't know what it was about the 924S, it just didn't do well on the heavier oils. It was happiest on 0W-40 M1.

User 52121

Previous owner ran 15W-50 in my 951. He primarily tracked the car, so it made sense. I got a lot of valve noise on cold starts though. Changed the oil and put 10W-40 in it. No difference in oil pressure, still noisy on starts but not as bad as the 15W was.

Heard about the Brad Penn oil here, stopped by a local distributor (Midwest Eurosport, they also happen to be a Porsche specialist shop) and they recommended against Brad Penn for the 951. Said they always run Mobil 1 for the watercooled cars.

Thinking about going to a 0W-40 next, if I can find it. Local WalMart only carried 0W-30.

gregeast

Just for the record, I'm seeing less oil consumption with 0W-40.

TurboTommy

What makes you say that? I've never heard that before.

EVOMMM

look guys i just want to state i use 15w50 M1 but ON THIER WEB PAGE they say to use 0w40 and NY porsche dealer says it as well
i am just confued thats all