Tell your doctor or dentist that you take calcium carbonate before you receive any medical or dental care, emergency care, or surgery. Lab tests, including serum calcium levels, may be performed while you use calcium carbonate. These tests may be used to monitor your condition or check for side effects.
Many newer vehicles now come equipped with an sensor or monitor where a light on comes on indicating you should change the oil. If you are lucky enough to have one of these you will soon realize how much of a waste it would be to change your oil every 3,000 miles.
Typically, if you have such an indicator, your car will run somewhere around 7,500 miles between oil changes. Short commutes, lots of traffic, etc. will typically make more frequent changes necessary. That said, changing oil more often just because is pointless. These are manufacturer designed and built indicator systems. They are not lowballing the need for new oil. I checked some dealer sites and they say to change the Camry's oil every 5,000 miles, though some say you can go 10,000 if you use synthetic oil.