mike993c2s

Ok, easy with your sarcasm there. I am not the "redundancy police", and I was just asking you a question and stating what my opinion was. When it comes to what oil to use, folks are very passionate and sometimes irrational on this subject. When I re-read your original post, I realize you're not seeking an opinion on oil but merely looking to find a source for M1 5W-50. So I apologize for going off topic.....

I just feel more comfortable with an oil that has a higher ZDDP content based on what I've read and heard. If there are a lot of people out there who run M1 5W-50 with no issues, I may use it too. Unfortunately, availability of this oil is limited in the US and I haven't seen too many reports of people using it in their 993s. I'm glad to hear that your engine runs great after all these years.

Off soapbox now..... Well, back to your original question. This place came right up on Google:

http://www.sparktecmotorsports.com/98hf24.html

Their site says they will usually ship the next day. Have you checked these guys already?

mike993c2s

Freeman,

Make sure this is the oil you've been using before buying it. Looking at your previous posts on Rennlist, you said you'd used Mobil 1 15W-50 as well as Amsoil 5W-40.

freeman

Mike-

Sorry for the sarcasm. It seems that some on this board do not tolerate those of us who still drive on the learning curve. Thanks for the input. Unfortunately, I will continue to do so.

I have found 6/case at $40.00/

funbug

Now, I am confused! What is the consensus on what is the best oil for the 993?

DanL993

No HTwo O

Use a Porsche approved viscosity and brand.
Change your oil at least yearly, regardless of miles.
Read more threads on Rennlist about oil.
Do Used Oil Analysis (UOA's) with labs like Blackstone to learn more about your specific oil choices, change interval, and engine's health.

Slow Guy

I run 5w40 in the Cayenne. Used to be I had no problems finding it at WM, AutoZone or one of the other auto parts stores in the area. Last week though, when I went to pick up the oil for this oil change I went to WM, AZ, O'Reillys (sp) and Advance with no luck w/ any of them. Would have even gone w/ Castroil in full synthetic but no luck there either. Wound up doing the 50/50 of 0w40 and 10w40 M1.

Don't know why it's not being stocked right now. Next time I will order it online before I need a change.

There is no "consensus", just do your research (MANY oil threads on this forum) and make your own decision. Either that or select a mechanic you trust and and follow his advice.

Bill Verburg

when it was new 993 recommended oils were
15w-40 or 15w-50 for ambients mostly >50F
15w-40 or 10w-40 or 10w30 for ambients mostly <50F
10w-30 or 5w-30 for ambients mostly <14F

at that time ZDDP content was not an issue as all the better oils had it in sufficient quantity

move forward from circa 1995 to circa 2011 and the concern for the effects of phosphorous on catalytic converter function/life has caused an across the board reduction in ZDDP to the detriment of engine wear. However some oils still have sufficient levels of ZDDP to warrant use.

among them
Mobil 1 15w-50 w/ P and ZN levels of 1200/1300ppm I'm comfortable at this level

but Mobil 1 5w-50 is at 1000/1000ppm where I'm less comfortable.

for best street protection use
Mobil 1 V-twin 20w-50 @ 1600/1700ppm

there is also a Mobil 1 racing line
0w-50 @ 1750/1850ppm but it lacks the detergents additive packages that allow street oil to last as long as it does, the racing oil would need to be changed weekly

of course you can also use alternative high ZDDP oil like Joe Gibbs or Brad Penn

the manufacturer's of newer cars are far more concerned w/ emissions warranties and have also changed engine design(roller rockers) to recommend the use of oils w/ lower ZDDP on new vehicles than in the past

look at the donut labels on the oil you are considereing
oil w/ this label is most affected by the reduction in ZDDP


oil w/ this label is least affected


here is a comparison chart for all Mobil oils

Flying Finn

I have a comprehensive oil comparison lab test between many different motorcycle oils and in 50 weight group, Mobil 1 V-twin 20w-50 came second after AMSOIL Synthetic 20W-50 Motorcycle Oil (MCV) (there was 17 different 50 weight oils tested).
I'm just about to change oil and am going to go with that Mobil 1 V-twin or Amsoil MCV. I use that Mobil on my Buell as well although I've been thinking about switching to that Amsoil.
Will do the analysis between what I have now (Red Line) and Mobil V-twin or Amsoil.

No HTwo O

I have been using the Mobil 1 V-Twin 20W50 in my 993 Turbo with excellent results the past year. UOA's keep improving after 3 changes and 15,000 miles. This was a great recommendation by Kevin.

CAHRERA

Interesting I didn't know we could use Mobil 1 V-Twin(Motorcycle oil) for our cars. I will definitely try it out for my next oil change since it seems harder to find Mobil 1 syn 15w-50 and it sounds like a few folks are using to Mobil 1 V-Twin.

matt777

+1 This was my point based on Charles Navarro's recommendation of 1200 ppm minimum. (LN Engineering)

Slow Guy

Just a tip, I use the V-Twin in the 993 but most of the stores around here only carry 4 qts max at a time. I guess that since it's for a motorcycle they don't sell that many qts. Usually I just wind up hitting 2 or 3 of the local stores to get what I need. YMMV

IXLR8

That can also mean you don't have many miles on the odometer or you don't go 10,000 miles between oil changes.

IXLR8

A spread like that has me wondering/worrying how well it stays in viscosity over time and possible hard use.