crw

I am getting ready for the yearly oil change.

Reading several threads, particularly from several respected mechanics on this thread, I am going to switch to Motul.

I believe the correct one is in the link below?

12L will run @ $180, which will leave extra oil for next year.

I could go with Mobil1 again at a cost of $72, but it seems the cost to benefit ratio is worth it.

It seems the 3 most cited oils are Motul, Brad Penn, and Mobil V twin

pp000830

Hi CRW
Oil recommendations are a contentious subject here. Probably because few if any owners of street driven 993 have experienced an oil-related engine failure and so folks' personal experience is somewhat subjective and anecdotal.

My OPINION is related to a street-driven car, for track-driven cars I have no experience.
My OPINION is any products labeled fully synthetic are preferred because at startup, and as they warm up, they fall into a
good running viscosity a lot faster than non-fully synthetic oils do. This can be seen on the oil pressure gauge. The result is better lubrication when it is needed most with a cold engine.

Our engines have heads that get very hot compared to water-cooled engines. For this reason, the additive packages that regulate viscosity break down more rapidly. My anecdotal experience with Mobil 1 is that my 993 Carrera with over 100K miles on the odometer uses little to no oil until about 5000 to 7500 miles on the oil change seeming to me that the oil additives are beginning to be cooked and have become less effective.

I believe beyond using the proper viscosity having slightly elevated zink levels in oil is advantageous for the durability of the valve train. I use Mobil 1 FS 0w-40 or FS X2 5W-50 with a slightly higher Zink (ZDDP) level of 1100 PPM. I would avoid motorcycle oils such as V Twin or racing oils with excessive Zink as it is thought to shorten the life of the catalytic converters. I buy Mobil 1 because it is readily available through Walmart and with the yearly manufacturer's rebate inexpensive. I am sure other brands of oil labeled fully synthetic (Polyalphaolefin PAO) with similar published Zink levels would be perfectly good alternatives.

Seeing that there are many examples of our cars with well over 100K miles on them that do not exhibit excessive oil consumption I have become a price customer at oil changes and would not pay a premium for oil above the competitively priced labeled fully synthetic oils with the slightly elevated zink levels no matter what their claims. For this reason, if a Motul product can be gotten with a good ZDDP level at a competitive price go for it!

In light of the above, a DIY oil change for me is a $60 to $80 endeavor, and also being over 60 is a three Advil two-hour effort. It took me a lot less time to do it a few years back.

Let the discussions begin!!
Andy

orangecurry

An oil thread? In 2023? In the 993 section?

Gosh.

For many years I ran exclusively on Motul, but not that one, and I've switched to Mobil quite a few years back *only* as the API formulation of my Motul changed...(as happens to all oils) but I don't use your Mobil either.

Where I live, the climate is such that 40 'weight' is the correct oil..... cue salvo..... so I can't help you.

SF Neunelfer

Interesting comment on the Motul formulation change. As the shop I go to, RMG in Sunnyvale, said he switched to Motul because Mobil1 changed it formula. This was just last year that RMG informed me of the switched.

As such Im running Motul 4100 in my 993

pp000830

Hi SF,
Very good point, I check Mobil 1 published data each year before I buy. Seems good to go by my criteria, latest chart 2022:
Andy

SpeedyC2

For the heck of it, I went to the Mobil 1 site and use their "Find the right oil for your vehicle" search function. The top matches (based on a 1995 911, over 75,000 miles) are the Full Synthetic High Mileage, Extended Performance, and ESP 5W-30 oils.

Each of these has a nominal zinc level of 900 ppm.

pp000830

Hi Speedy,
Best to use their PDF chart.
https://www.mobil.com/lubricants/-/m...--may-2022.pdf
Andy

SpeedyC2

Thank you. I noticed the one I had found was an earlier version...

Would you mind providing the link to where this is on the website? (As opposed to the PDF link above)?

71-3.0-911

I run Motul 300V 15w-50 as recommended years ago by Mr Weiner. Been happy with it.

abiazis

I use Motul 10-60 and very happy with it.....engine is quieter at start up after sitting a day or two, use less oil between 5K mile or yearly changes, as I was using about 1/2 quart per 1000 miles with Mobil One 15-50......don't add any oil with Motul - have used it for last 2 oil changes.....

rdad993

Changing oil every year on 911's that don't get a lot of use means the oil doesn't break down or deteriorate from the original formulations. Personally I have always used the Mobil 1 V Twin 20W50 on our 911's going way back, no issues with anything, no cat issues, no top end issues, nothing. Motul is a great oil I am sure but if you are changing oil every year on a low use car they are all great. Running out to say, 7,500 miles or more, the oil starts to break down, as they say. Racing is totally different, but just cruising, etc. even a few track days, any good oil, dino or synthetic will do. Just personal preference and what you are used to. These cars need to get exercise, just like us all, just putting around is not the best.

abiazis

I have used my car the same way for 24 years, or 75k miles…..don’t baby it. Etc… drive it with snow tires in the past, tracked it, mountain runs with faster cars…..that said, so I believe I am comparing apples to apples, Motul gets my vote after using Mobil One for 22 years…..seems to be a better formulation…runs quieter and less usage of oil, so I am sold on it…..I also have multiple cars….but drive it at least weekly since I’ve had it…..I am running Mobil One in my 991.2 and for my water cooled cars that I have it seems good…..living in all types of climates….Ga, Md, NY, NJ, NC….all conditions…I even putted my way from California to NY in 2 days, so all said, that’s my frame of reference…..no right or wrong just observations through my experiences….))

pp000830

Hi Speedy,
I never went through their site to find it. I used a Google search "Mobil 1 comparison chart PDF" to find it.
Their site has hundreds of technical PDF format articles that don't seem to tie to a page on their marketing website.
Andy

abiazis

I have used my car the same way for 24 years, or 75k miles…..don’t baby it. Etc… drive it with snow tires in the past, tracked it, mountain runs with faster cars…..that said, so I believe I am comparing apples to apples, Motul gets my vote after using Mobil One for 22 years…..seems to be a better formulation…runs quieter and less usage of oil, so I am sold on it…..I also have multiple cars….running Mobil One in my 991.2 and for my water cooled cars that I have it seems good…..living in all types of climates….Ga, Md, NY, NJ, NC….all conditions…I even putted my way from California to NY in 2 days, so all said, that’s my frame of reference…..no right or wrong just observations through my experiences….))

GJSPIN

The reformulation of oils has to with Direct Injected Engines and the altering of the detergent package in the oil to address the ongoing LSPI issues. You'll generally find that those with API SN-Plus and SP designations will have the Calcium level down but the Magnesium level up. This started with many oils designated even as API SN. These latest oil API designations didn't require a change to their Zinc/Phosphorus levels or their base oil structure. Only the detergent additive package to meet these API latest designations and to ultimately combat the ongoing LSPI issue. Suggest you look at WWW.Speediagnostix.com to learn more from Lake Speed,Jr. on such.