In 2006 he returned to Australia and to the V8 Supercars Development Series with Jim Morton's Decina Racing, finishing 4th in the championship. In 2007 he was runner-up in the Development Series, again with Jim Morton's renamed Ford Rising Star program. He also made three main-game V8 Supercars starts in this period. The first of which was at the 2006 Bathurst 1000 as a replacement for Mark Porter in a Brad Jones Racing entry. Porter had a serious crash on the Friday of the event and later died in hospital. In 2007, Caruso entered the Sandown 500 and Bathurst 1000 with WPS Racing.[3]
In 2013, Caruso moved to Nissan Motorsport, a four car team running the Nissan Altima L33. The team was the first to introduce a new manufacturer to the category under the New Generation V8 Supercar (then known as Car of the Future) regulations in 2013.[5] The team largely struggled with the new package and Caruso finished 23rd in the championship. The highlight of the year for Caruso was at the Winton 360, where he finished second in the opening race. Caruso had been leading the race at the conclusion of the first half of the split race, however was beaten by teammate James Moffat to victory in the second half.[6]
In 2014, Caruso finished a career-high 10th in the championship, despite only scoring one podium, in the second race of the Gold Coast 600. Caruso also took pole at the non-championship V8 Supercars Challenge race, a support event to the Australian Grand Prix. Having featured Norton 360 sponsorship in 2013 and 2014, from 2015 onwards, Caruso sported a corporate Nissan and Nismo livery. After another lean year in 2015, Caruso began 2016 strongly at the season-opening Adelaide 500. Caruso finished second in the Sunday race and led the championship following the event.[7] At the 2016 CrownBet Darwin Triple Crown, Caruso won his second career championship race, seven years after his first and coincidentally once again at Hidden Valley Raceway.[8] On 30 January 2019 it was announced that Caruso would lose his drive with Nissan Motorsport. He will not compete full time in 2019 and is yet to announce an ENDURO drive.[9]
^Greenhalgh, David; Howard, Graham; Wilson, Stewart (2011). The official history: Australian Touring Car Championship – 50 Years. St Leonards, New South Wales: Chevron Publishing Group. ISBN978-0-9805912-2-4.