Home Automotive & Car Tech Castrol GTX MAGNATEC Full Synthetic Motor Oil – 5 Quarts from $17.88 Automotive & Car Tech Castrol GTX MAGNATEC Full Synthetic Motor Oil – 5 Quarts from $17.88 By ARCOM - 20 January 2018 197 0 SHARE Facebook Twitter Go to the deal page: Castrol GTX MAGNATEC Full Synthetic Motor Oil – 5 Quarts from $17.88