Yes, the gasket material is in fact oil resistant. The material is Reinz AFM30 for the upper gaskets and Reinz AFM38 for the lower ones.
According to the datasheet I’ve found, both materials are rated "resistant" to engine oil on a scale of resistant/somewhat resistant/not resistant.
Still, the manufacturer recommends to always install the gaskets completely dry, so that’s what I will do, although chances are that they would have been ok with the oil on the gaskets.
Better safe than sorry.
PS: our intake gaskets are also resistant to mayonnaise and cocoa butter!
