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.
The Pro Mazda Championship presented by Cooper Tires, formerly known as the Star Mazda Championship, is an open-wheel racecar driver development series in North America.n December 2012, series founder Gary Rodriguez announced that the series had been sold to Dan Andersen's Andersen Promotions (which already sanctioned the F2000 class on the Road to Indy) and would be renamed the Pro Mazda Championship. Andersen previously owned a multi-car Star Mazda team, Andersen Racing.