Is too much oil in the crankcase a problem?
5 quarts of oil were put into my 2004 Miata. On the dipstick, it comes up a bigger distance than the distance from "low" to "full." The old oil was drained thoroughly. 1. Will this overfill hurt my engine? I'm not driving it again until I find out. 2. Is the oil pan or dipstick or something an odd shape that causes the high dipstick reading, or does the dipstick reading mean I'm over a quart full? 3. How much oil is missing at the "low" dipstick mark? Thanks!

