Replacing a rusted lower oil pan on a 2006 Nissan Altima with a 2.5 I4 engine. The factory install used RTV only. I would rather use a gasket if possible. Online configurators on Amazon, RA, etc. say what looks like the exact gasket doesn't fit. I'm wondering if that's just because it didn't have one from the factory. And actually they fit. Wondering if anybody has used the gasket instead of RTV.