Sunoco at 290 S Gulph Rd in King Of Prussia, PA is proud to partner with Weis Gas Rewards to bring you premium fuel choices and great savings. Enjoy regular, mid-grade, and premium Top Tier™ gasoline, plus 94 octane fuel as part of our selection – all while earning Weis Gas Rewards every time you fill up. Inside the convenience store, pick up snacks, drinks, and daily essentials in a quick, clean, and welcoming environment.