^ That's a great testimonial

 

I wanted to ask if 15w50 is too thick for the S2000 ?
i wanted to run to turbulences 300v competition like all my car but i saw no one revommend it there is a reason ?

 

Oil choice is a very touchy subject.
I'd say that as as a general consensus on what people CAN agree on is:

- Run a full synthetic oil
- Run at least an "X"w30 weight oil.
The lower number -"X"- is mainly for cold weather operation - up to you to decide if your s2k is a fair weather vehicle or a year round vehicle.

The next number is up for discussion on what you think is appropriate for your application.

The "brand" of oil you run is also subjectively debatable. If you want answers - send your oil out for analysis in between changes.
I've been running Shell Rotella T6 in 5w40 for an s2k that was daily driven for about 3 years before turning into a full time track/weekend vehicle. My oil analysis says that all is peachy. I change every 3K miles or every 3 track days, which ever comes first. These days it's pretty much all based on track time.

My opinion - and take it as that, an opinion - is that 15w50 is too viscous and heavy for the F20/22, even for track use.

 

No way. In my opinion, this oil is way to thick. Have a look at the bearing tolerances in the S2000 Engine. It´s not the 60s anymore where engiens where build with sloopy tolerances.
I use 15w-50 in my motorcycle, just becaus the oil also lubrictes the gearbox and gives smooth shifts and the clearances between the Crankshaft and the rods are really loose compared to modern engines. It´s a engine from the 80s.

In a S2000 i would use a 5w-40 or a 10w-40. You have plenty of choice of modern, synthetic high performance 5w-40 out there. But it´s harder to find a good, moderen 10w-40.

 

Just a word of warning or hint: Shell rotella was critizied heavy in the Bob is the Oil guy forum lately for failing a Lab test regarding foaming (when the engine runs, it´s a giant egg beater) and other things.
You may ask and read there https://bobistheoilguy.com/forums/

 

Topic of the video is thin oil but there's good info here.


-- Chuck

 

More Information as you ever need:
https://www.youtube.com/@themotoroilgeek
https://www.youtube.com/@LubricationExplained
https://bobistheoilguy.com/

 

I'm still a believer that you should try to keep the spread in numbers lower if possible, the higher the spread the more chance that viscosity index improvers are used to get that wider spread. There are a few oils that don't use VII's but a lot of oils still do. 15w-50, 20w-50, and 10w40 used to be some of the weights I would have avoided. You will be losing hp with a 50 weight if that is important, but you can still get great protection with a 30 weight and 40 weight (when temps dictate a need). Base your oil selection based on expected oil temps you will see during driving. I would like to think I am pretty knowledgeable when it comes to motor oil, but I am going to take a page from RFK JR. and suggest that no one make personal decisions based on my recommendations and acts.

 

My conclusion regarding the viscosity index improvers is to change the oil more often and use high quality, real synthetic oil. If somebody is interested in engine oil, he is on a trip down a rabbit hole reading all the stuff.
But at least in the Bob is the oil guy forum are some members with reall professional background and knowledge.

 

Try to find oils that little to no VII's, Mobil1 has some oil formulations like that, but not all of their lines. I don't really know who does or doesn't, the oil experts likely know. The biggest issue I have with VII's is that they have no lubrication properties, so better to have none if possible.