A composition comprising, based on the total weight of the composition: (a) from 10 to 80 wt. % of a polybutylene terephthalate; (b) from 10 to 80 wt. % of a copolyestercarbonate component, comprising a first copolyestercarbonate having a number average molecular weight of 15,000 to less than 28,000 Daltons, and a second copolyestercarbonate having a number average molecular weight of more than 28,000 to 40,000 Daltons, wherein a weight ratio of the first polyestercarbonate to the second polyestercarbonate is 75:25 to 25:75, and wherein each copolyestercarbonate comprises structural estercarbonate units of the formula: wherein each R 1 is independently the same or different C 6-30 aromatic group, each T is independently the same or different C 2-16 alkylene group, and x is the mole% of ester units in the copolyestercarbonate based on the total mole% of ester and carbonate units and is 1 to 10, wherein the ester and carbonate units represent at least 90 mole% of the polyestercarbonate; (c) from 3 to 30 wt.% of a particulate filler; (d) from 0.1 to 10 wt.% of a fluoropolymer; (e) from 3 to 25 wt.% of a polymeric impact modifier; (f) from 0 to 5 wt.% of an additive selected from the group consisting of an antioxidant, mold release agent, colorant, quencher, stabilizer, and combination thereof; and (g) from 0 to 30 wt.% of a homopolycarbonate, copolycarbonate or a combination thereof. (a) from 10 to 80 wt. % of a polybutylene terephthalate; (b) from 10 to 80 wt. % of a copolyestercarbonate component, comprising a first copolyestercarbonate having a number average molecular weight of 15,000 to less than 28,000 Daltons, and a second copolyestercarbonate having a number average molecular weight of more than 28,000 to 40,000 Daltons, wherein a weight ratio of the first polyestercarbonate to the second polyestercarbonate is 75:25 to 25:75, and wherein each copolyestercarbonate comprises structural estercarbonate units of the formula: wherein each R 1 is independently the same or different C 6-30 aromatic group, each T is independently the same or different C 2-16 alkylene group, and x is the mole% of ester units in the copolyestercarbonate based on the total mole% of ester and carbonate units and is 1 to 10, wherein the ester and carbonate units represent at least 90 mole% of the polyestercarbonate; (c) from 3 to 30 wt.% of a particulate filler; (d) from 0.1 to 10 wt.% of a fluoropolymer; (e) from 3 to 25 wt.% of a polymeric impact modifier; (f) from 0 to 5 wt.% of an additive selected from the group consisting of an antioxidant, mold release agent, colorant, quencher, stabilizer, and combination thereof; and (g) from 0 to 30 wt.% of a homopolycarbonate, copolycarbonate or a combination thereof. each R 1 is independently the same or different C 6-30 aromatic group, each T is independently the same or different C 2-16 alkylene group, and x is the mole% of ester units in the copolyestercarbonate based on the total mole% of ester and carbonate units and is 1 to 10, wherein the ester and carbonate units represent at least 90 mole% of the polyestercarbonate; (c) from 3 to 30 wt.% of a particulate filler; (d) from 0.1 to 10 wt.% of a fluoropolymer; (e) from 3 to 25 wt.% of a polymeric impact modifier; (f) from 0 to 5 wt.% of an additive selected from the group consisting of an antioxidant, mold release agent, colorant, quencher, stabilizer, and combination thereof; and (g) from 0 to 30 wt.% of a homopolycarbonate, copolycarbonate or a combination thereof.