informasi, info, harga, isi ulang, refill, lpg, elpiji, 12 kg, 12kg, 5,5, bright gas, konvensional, biru, merah, pink, di, indomaret, jual, tabung, gas, isi, terdekat, 2019, 2018, 2020, alfamart, beli, dimana, murah, agen, pangkalan, pertamina, 2021, 2022, naik