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).
1 Transmission flush - 20,000 miles. 2  Transmission Filter - 50,000 miles. 3  Radiator flush. - 30,000 miles. 4  Air filter. - As needed. 5  Oil change. - 3 months or 3,000 miles - usually right away with new vehicle. 6  Emissions clean. - 25,000 miles. 7  Brake inspection. Right away with new vehicle. 8  Serpentine belt - 50,000 miles inspect often.