Calcium compounds are widely used. There are vast deposits of limestone (calcium carbonate) used directly as a building stone and indirectly for cement. When limestone is heated in kilns it gives off carbon dioxide gas leaving behind quicklime (calcium oxide).
How to Change Transmission Fluid. Transmission fluid needs to be changed from time to time in order to extend the life of the transmission, usually every 30,000â60,000 miles (48,000â97,000 km) (sometimes more â check your owner's manual for service intervals).
âThis transmission fluid will be good until the transmission decides itâs going to fail, which isnât until 140,000 to 160,000 miles, so the consumer felt comfortable with that statement. The reality is, though, all transmission fluid should be changed.