sentences:  The next period of significant V8 usage in Formula One was from 2006 to 2013, when the rules mandated use of naturally aspirated V8 engines (in order to reduce the power outputs being achieved by the previous 3.0 litre V10 engines).These were replaced by 1.6 litre turbocharged V6 engines for the 2014-present seasons.American premier stock car racing NASCAR series has been dominated by V8 engines since the its inaugural 1949 season.