I bought a restored '56 Crown Victoria.  It has stock 15" wheels and stock full coverage hubcaps.  I don't think I have over 30 miles on it since I bought it.

I have had the hub caps fall off 4 times.  Three times for the left front and one time for the left rear.  I even bent out the tangs slightly on the LF hubcap and it still fell off again.

Any suggestions???