Muir achieved successful seasons competing in saloon car racing. In 1965 he finished third overall in the
Australian Touring Car Championship. In 1968 he finished as runner-up in the
British Saloon Car Championship driving a
Ford Falcon behind fellow Australian
Frank Gardner. Two years later he finished third in the BTCC, following up that result with a victory in the
RAC Tourist Trophy, the longest running and one of the most prestigious prizes in international motorsport, later that year. He drove a
Chevrolet Camaro to the
checkered flag, making him the first
Australian to claim the trophy. He finished runner-up in the
European Touring Car Championship in 1973. He also regularly competed in the
24 Hours of Le Mans driving alongside the likes of
Jackie Oliver,
Graham Hill and
Jacky Ickx, and he won the
1000 km Catalunya in 1968 (with
Francisco Godia Sales). The last race Muir competed in was the
RAC Tourist Trophy before dying on his way home. ==Career results==