I tried going a search, but didn't come up with anything. I know that the oil specified for the base model RSX is 5W-20, but that oil is hard to find in my area. Where are you guys going to get this weight oil? Or are you going back to the dealership?

I'm currently putting in 5W-30 Mobil 1 Full Synthetic. I realize that the K20A is probably manufactured really tight and can use the light weight 20 oil, but am I screwing something up by using 5W-30? Please give any input you can.

I'm in western Washington state which has very moderate temperatures. Doesn't usually get hotter than 80 degrees in summer, or colder than 32 degrees in winter.

 

k20a2 calls for 5w30

so you are fine

 

What your using now is fine..... oil for the buck!