Disclosed are compositions having the characteristic of improved heat distortion temperature for compositions comprising a poly(phenylene ether) resin, a polyester resin, a polycarbonate resin, a reinforcing filler, and a heat enhancing non-fibrous filler in combination with a poly(tetrafluoroethylene) resin. The compositions may further comprise at least one additive from the group consisting of impact modifiers, non-elastomeric polymers of an alkenyl aromatic compound and an additive package. The flow of such compositions can be further improved with the addition of an optional flow promoting terpene phenol material without significant loss of the physical properties.