In the market for a C-3 oil? Looking to use Fuchs? Would like to know more? Don’t worry Opie Oils are here once again to help. Opie Oils stock Fuchs Titan GT1 Pro C-3 XTL 5w-30. Fuchs Titan GT1 Pro C-3 XTL 5w-30 has the new XTL-technology for maximum cold start ability and outstanding performance reserves. For modern passenger cars and light commercial vehicles with or without extended service intervals.