That's the problem, the oil pan bolt area is not flat. You will have leaks. I would use the toyota fipg. That stuff will never leak. Also don't forget about the 2 short bolts by the timing belt.
Quoting GSTwithPSI:
Quoting turbowop:
That gasket is also more prone to leak.
But less prone to oozing into the oil pan, flaking off, and clogging an oil passage or the sump. Regardless of what the Mitsu manual says or how carefully you apply it, IMO RTV isn't a good substitute for a real gasket when available. If your mating surfaces are clean, flat, and your gasket is torqued properly, it won't leak. I'd say no matter if a gasket or RTV is used, proper installation is the important part, and in my case that means a copper coated Fel-Pro gasket.