ZiTrO

I read the sticky above about the oils that are supposed to be used and it was only now that I learned that I should check the oil cap as to what kind of oil is to be used (10w30 etc.) I checked my oil cap just now and it says 10w30, but the prob is I changed my oil and got used to using 10w40 so I had 10w40 oil right now in my engine. Now I'm thinking of changing it immediately. Do you guys think I should change it asap or it's ok if I still go with what I have inside now which is 10w40. Does it have a big effect?

Help me out guys so I can do something about it. I feel bad though coz I already spent for 5 1/2 liters of motul oil and thinking that it's going down the drain.

xviper

You've got a slightly thicker oil both on cold starts and when at operating temps. You live in the Philipines. You don't get cold. Just warm it up a couple more minutes after you get to "3 bars" on the temp gauge before you try any theatrics.

SpitfireS

Overhere in Europe 5W-40 is also listed as a recommended oil.
Of course the famous 10W-30 is in the manual as well.

You are using 10W-40, both "viscosities" are mentioned in the recommended oils.
The 10W and the 40.

At a cold start the viscosity of your oil (the 10W part of the 10W-40) is going to be close to the 10W part of the 10W-30.
At operating temp it is going to be close to the 40 part of the 5W-40.

That means you have no problem.

Without knowing the 2 brands of oil there is no way anyone can say a typical 10W-30 is thinner then a 10W-40 at a cold start.
One has to do a full viscosity range analysis to make that statement

ZiTrO

Thanks for the replies xviper and splitfires The oil I got for my car is the Motul H-Tec 100 10w40. My other friend had 5w? oil in his car and told me I was going to get into trouble with the engine with what I had done. Good thing I know about this site hehehe He's a new owner of an S2000 too

Somehondaguy

haha theatrics... good usage there...

TR-S2K

The only thing you may experience is slight reduction in fuel economy.