That is interesting:
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However, the user manual still recommends using 5W-40.

 

After all the discussion, here's my take.....you can use any high grade oil and it will be just fine. The rest is all just mental ************. If you are repeatedly tracking your car for high miles, maybe this matters (or not), but for the majority of owners with limited mileage and only occasional track time in these cars, I do not believe it will make a practical difference in anything. An oil that will work in a Koenigsegg or Bugatti isn't going to cause a Porsche engine to disintegrate.

 

Is that the same OM that shows the oil fill on the left side?

 

Haha, I never noticed that. Good catch!
Indeed, this is the same manual.
I still believe that the 5W-40 grade is suitable for this engine. There are better 5W-40 oils available, and several years ago, MY21 and older models had a whole list of approved oils with both grades.

 

I would say that maintaining the factory engine warranty is more than mental masturbation. Once the warranty is expired, you may have a different decision.

 

^^ This
The whole thing over Porsche's recommending M1 oils for their engines so it must be crap because it's all about marketing (although there is a healthy dose of marketing involved), so anything else should be better, is getting pretty crazy. In this case, even Charles Navarro of LN Engineering is on the record saying the M1 ESP X3 formulation is a big step forward in the elimination of sludge and prevention of pre-detonation in direct injected engines that are predisposed to it. There's so little difference between 0w and 5w, it makes no sense to let the tail wag the dog just to be able to use 5w-40.

 

Hello 718 Spyder/GT4 owners,
Porsche recently changed the oil recommendation for "GT cars" to C40 GT. They list all the cars that have the engine that revs to 9000rpm, however, the regular Spyder/GT4 do not have that engine. Has anyone heard if we are supposed to stay with Mobile One ESP X3 C40 SAE 0W-40?
Or switch to the new C40GT?

 

as per Mobil press release
Mobil 1 C40 GT 0W-40 is not suitable for Porsche vehicles requiring an A40, C20, C30 or C40 approved Mobil 1 engine oils.

so good news for us ‘non-RS’ers’ as I’m sure its price has also been “specially formulated” to be proportional to price of the applicable cars

 

Not entirely true. The 992 GT3 engine was allowed to use C40 oil prior to the arrival of C40GT.

 

As I understand the new classification for oil in the GT4-RS is C40GT. I am wondering if Motul 300V is better than this specification...? It certainly is the best oil for racing motorcycle engines. Don't want to open up a snake oil discussion but in our experience engines that are run hard seem to do better with Motul 300V compared to any other oil...

 

Motul 300V is one of the best motorsport oils so it s probably much better regarding engine lubrification on track and for engine wear

Of course as a motorsport oil it s supposed to be better but requires to be replaced more often than the supposed longer lasting modern oils as it has less detergent properties

Especially oils approved for latest cars are made with many other priorities other than mechanical engine wear as for exemple fuel economy , longer service intervals , not damaging the oem catalysers and particulate filters and price

From what they wrote the C40 GT seem to be really close to the previous C40 that was ok to use on later GT cars

What they are maybe doing is just changing the spec of the C40 ( making a new oil that keeps the C40 branding but with the updated C40 requirements ) to something only good enough for the non GT cars while being even more specifically formulated to not damage the particulate filters but not good enough for the GT cars engine

For marketing it s better to rebrand the old C40 oil into C40 GT than specify that they made a worst oil for the non GT cars


That s not to say that the motorsport oils are necessarly better suited and for a normal use and especially if the car is under warranty for road use it s recommended to use the approved oil of course


Another thing to find out is if the other brands of oil like Motul and Liquy Moly that have some C40 approved oil ( old formula and previous C40 spec that is supposed to be ok for GT cars requiring C40 ) will change the formula to meet the latest
C40 spec and so their C40 oil will also become not OK for GT cars ( probably ) and if they will then offer their own C40 GT spec