Ongais next drove in CART during the &lt;a href="1983%20IndyCar%20season"&gt;1983 CART/PPG World Series season&lt;/a&gt;, first driving at the 1983 Indianapolis 500 driving the #65 Interscope Racing March 83C-Chevrolet V6 however, the car was replaced with the #25 March 83C-Cosworth DFX and he started in 21st place and retired with mechanical problems.