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.
If you have been doing short trips in town you will need shorter oil change intervals than if you are driving on the freeway a lot. It also depends on the type of oil. Synthetic oil will go a lot longer than mineral oil without sludging. What you don't say is 1000 miles past what - how many miles it has actually been. If you are up to 4000 miles now it is no big deal. If you are up to 11000 miles now (some cars, especially in Europe, are going to 10K mile intervals) that is a bit much. My Prius sedan has 7500 mile intervals, 5000 in severe conditions.