I guess it wouldn't be a ZR-1 without an oil leak.

[XfireZ51]

Originally Posted by secondchance

On the oil filter housing facing forward low an hidden - oil temp sensor
On top of oil filter housing - oil pressure sensor
Right side of filter housing facing down - low oil pressure warning sensor
Under and behind low oil pressure sensor - cam chain tensioner port
Above oil pan - crankshaft sensor
Under the crankshaft sensor, on the oil pan - low oil level sensor

Of course, oil pan gasket can be a source of oil leak also.

Oil leak can be any of above or combination of above locations.

You can immediately eliminate all the ones that are easy to get to.