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.
Mazda Cars - Select a Model. About Mazda. There are affordable cars, and then there are cars that offer thrilling performance. Rarely do the two ever converge, but Japanese automaker Mazda has made it a tradition of coming up with vehicles that combine both of these eminently desirable traits. The Toyo Cork Kogyo Company, founded in 1920 in Hiroshima, Japan, used the name Mazda for its first three-wheeled truck, built in 1931.