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).
To find out what type of transmission fluid your vehicle uses, check out this article about different types of transmission fluid. Lastly, how often you get your transmission fluid changed depends on whether you flush your entire system or just drain the pan. Your transmission may hold 15 to 20 quarts of fluid or more! If you simply drain the transmission fluid pan you will only change 3-5 quarts leaving lots of dirty fluid still in the system.