I love not having a payment on an older vehicle, but when somethin' starts a spewin' it needs to be taken care of.

On my 91 Suburban, I have a puddle opf coolant sitting on top of the intake manifold, drivers side, next to the air intake. I bought the gaskets, new coolant, and oil for an oil change. I also bought a bottle of stuff that runs thru the oil to pull crap out of the engine.

My question is when do I change the oil? I am assuming after the gasket swap, or do I need to do 2 oil cahnges?

I'd do it after the gasket change. What'* the stuff you're putting in the oil? Like Seafoam? I'd put that stuff in, run the car for a while with it in there, then do the gaskets, let the engine run some more for a while in Park, then change the oil.

It'* a NAPA branded oil flush. I prolly should seafoam too