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).
Thatâs why itâs recommended to get a fluid change every 30,000 to 60,000 miles, or once every 2 to 4 years. This is the optimal schedule for the average driver and will allow your transmission to run on healthy fluid constantly, which ultimately means a longer lasting and more efficient transmission.