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I have a base rsx and I've been wanting to change my own oil to save a little bit of extra cash. Anyway, the base uses 5W-20 and the Type S uses 5w-30. I know it's a little bit thicker for the type S, right? for the engine difference. It's damn near impossible to find 5w-20 for my car. would it be okay to switch over to 5w-30 or is that not a good idea. The dealership said, no bueno. I could ruin the car if i switch. But I know once you got syn, you can't go back. What do you guys think?