Expire is not really the right term; but effectively yes. In general a cheque older than six months will be considered stale-dated and will not be honoured. Reference the Canadian Payments Association FAQ.
SKYACTIV is a brand name for a series of technologies developed by Mazda which increase fuel efficiency and engine output. The initial announcement of the SKYACTIV technologies include new engines, transmissions, body, and chassis, which appeared in Mazda products from 2011.
In the 1950s, Mazda began making small, four-wheel trucks. The company launched its first passenger car, the R360 Coupe, in 1960 in Japan. Seven years later, Mazda debuted the first rotary engine car, the Cosmo Sport 110S.