trophy

There are a number of places in Calgary that either keep it or can get it:

Tunerworks, RCTS, Blackfoot Motorsport (Motorbike Dealer)

Alot of the Ducatti dealers keep Motul, slightly different packaging but is the same oil (300v).

matt777

It looks like great stuff based on the P and Zn levels. My understanding is that the higher viscosity oils don't have to comply with the low P and Zn level requirements of SM. If you look at the Mobil 0W40 levels you will see that they are around 1000 ppm which is disappointing seeing as Porsche recommends it for our engines. I was never confident in Porsche putting much effort into supporting the old stuff and was surprised to even see recommendations on the air cooled cars. I wouldn't expect it to be their focus and they don't have to accept the risk of engine wear.

MarkD

Right, and I wouldn't recommend 0W-40 (except in pretty cold climates)
Totally agree with the current Porsche focus not being on air/oil cooled!

But 15W-50 seems to be good... which leaves me asking the same question again. What was all of the fuss about last year? The word was that M1 15W50 had drastically reduced Zn and P levels. That was the compelling reason to bail on M1.
So...

matt777

Wasn't it based on the EP version?

ps I didn't intend on starting another dreaded (by some) oil thread but look at what I have done.

MarkD

oh heck.. maybe it was.

Yeah, we shoulda saved this topic for the winter when we are all bored

mongrelcat

I believe that the issues with the 15w50 were with the gold cap EP version from 2002? to 2007?? The previous version with the red cap was tried and true for the air-cooleds. The newer silver cap is the revised and re-introduced version, and it has the ~1200ppm Zn/P levels again. Whether or not other formulation changes make the revised version less effective for our cars is another question. Mobil specifically markets the 15w50 (only) for "older valve train designs that may benefit from a higher level of anti-wear normally not required for newer generation vehicles. Mobil 1 15W-50 will also provide better anti-wear protection for higher valve spring tensions in certain racing engines."

Note the above quote pertains to the US version. The Canadian M1 15w50 is a totally different formula apparently, with no mention of a "higher level of anti-wear" on the spec sheet. (See links below.)

Matt, do a VOA if you want to still want to use it, I will do the same and we can compare here. It would be a bit apples-and-oranges anyway, as we'll have to use different labs, but it's something. Like I mentioned previously, I have not found a recent VOA/UOA for M1 15w50.

US:
http://www.mobil.com/USA-English/Lub...il1_15W-50.asp

CA:
http://www.mobil.com/Canada-English/...l_1_15W-50.asp

dcdude

Mobil 1 15W-50
P= 1200
Zn= 1300

So what are the target levels of P and Zn we're shooting for (again)?

MarkD

yup

and right about there.
According to LN Engineering, when you get close to or over 2000 ppm, more is not better

Edward

FWIW, Mobil1 5w/40 Truck-TDiesel oil has ZDDP at 1100 (IIRC).

And the benefit of thinner "cold" oil viscosity to get to moving parts faster/better than the M1 15w/50 is a factor in engine longevity, too, is it not? Afterall, for practical purposes doesn't the "40" weight protect as well as a "50" weight when up to operating temps in a street-driven car? It seems (to this layman, admittedly) the benefit of a lower initial number would be good for our engines in any climate upon startup-to-warmup, no?

Perhaps the 5w/40TTD is a good alternative. Or perhaps the better compromise is to mix this with the 15w/50 in near equal proportions. Thoughts??

Edward

matt777

I thought I read that 1200 was the target (Charles Navarro?)

The actual label says it has extra wear additives. I was told that the product line has been streamlined in Canada as the Esso lubes are gone and only Mobil exists. If you go to the Mobil1.ca site you will eventually find this:
http://www.imperialoil.ca/Canada-Eng...l_1_15W-50.pdf

matt777

You make a very good point. I believe a very large part of the wear, at least on some components, is incurred on start-up. Only a specialist could say when increased wear kicks in as the temp. drops. I don't plan on starting it up below freezing anyway.

95 C4 993

There is a 993 on this board that has 250,000 miles on the clock with no major engine work. If I recall, he changes the oil roughly every 10,000 miles or so. I believe its been Mobil 1 15 50 the entire time.

You read about top end rebuilds at 50k and then there are those who keep chugging along at 200k+ miles with no major problems.

There will be a lot of people dead on this board before they probably realize some chemical may or may not have had a negative or positive impact on their 993 because the lack of driving it. That is, the average driver. Whats the better story when your old? Having a 993 for 30 years and putting 80k miles on it or 30 years and a million miles?

I have been laid in the front seat of my C4, thats the story I will pass along!!

bluejam

I have been laid in the front seat of my C4, thats the story I will pass along!!
__________________
+1....me too!

dcdude

^^ You nasty boys! ^^ One advantage of being shorter than me, Jody!

Rinty

Don't try it in an MG Midget...