Return to Mech City

Robot science fiction as you've never seen it before!
Life goes on in post-apocalyptic Mech City, but it's no longer us. Winston, humanite model robot, returns to the town of his manufacture to find that all the real humans have perished. The robotic survivors are declining into self-destructive despair. He inspires the demoralized residents and becomes the de facto leader, relishing his new-found authority. Then a Roboto Fascist coup establishes a brutal new regime. Making a “virtue” out of necessity, Winston falls in with the new order to suppress the “metal man” majority of less cosmetically advanced robots. Inspired by Star, the world's first sexually functioning female robot, Winston renounces the fascist regime and departs on a mission to win back the town. Hopefully, he can also get upgraded to satisfy Star's robust desires.
Dystopian science fiction, dark humor, political & social satire, robotic romance - a generally fun read

Book 1, Robot Horizon series.