higuys how are you doing. well i have a problem getting same oil viscosity .i used motul v 300 5 w 40 but i cant find it anymore.
because i live in a third world country (Panama). i only have 10 w 40 v 300 motul my question is if i can use 10 w 40 over the 5 w 40 with no issues. thanks for the advices

 

bump

 

u wont have any issues

 

40 weight is 40 weight, and I seriously doubt you have to worry about the cold weather viscosity in Panama!

 

Hey I lived in Panama for 2 years when I was 11-12. Miss the lightning storms and geckos. Lol but yeah you should be fine. But why 40 weight and not 30 weight?

 

Because 5W40 is the alternate oil as per the service manual. Since he lives in Panamanian heat, 10W won't have much affect. 40 weight thins out less in heat, maintains better oil pressure during hot operation. Besides, the bulk of the rest of the world, S2000s typically use the alternate viscosity.

 

well right now i am using 5 w 40 motul , i expect that you understand me that i am not going to change all the oil just add some oil because i just did a full manteinence 2 months ago. i just bought 2 liters of 10 w 40 because the car needs oil. is these is ok.salutes to everyone my ap2 have 70 000 miles is bone stock.

 

Good question
And IMO it should be the first question.
Sure, 5W-40 is the alternate oil, but, yes, really , there is a reason they mention this viscosity.
And the reason is: as soon as the outside temperature drops below a certain level the 5W-40 oil is the alternative.
In other words, if it gets to cold when you start your car you need thinner oil.
And they pick the changeover temp low enough to make a 5W actually thinner than a 10W.

Another confirmantion of this is the oil selection chart, you'll see NO upper ambient temp limit for the 30 and 40 weight.
Just a higher lower (yes, really, how elso do you say this?) ambient temp limit for the 10W oil.
Read your manual.

Why didn't they recommend 5W-30 then, I can hear you think?
Well.. in 1999, when most of the tech parts of the manual were written, 5W-30 oils were not that good.

So bottom line: go find a 30 weight.


And to answer your question: mix all the API certified oils you want.
All those engine oils are compatible with eachother.
On a scale from 1- 10, 1 = bad, 10 = good.

Low oil / no oil = 1
Mixing oil = 7