I have a 2002 Z06 with 26,000 mile and origial tires that I have had for about 6 months. One of the tires looked a little low so I checked then all. Pressure varied between 19 and 28 psi. The 28 psi seemed more in line with what I would expect but was interested in other opinions. As much as these tires cost I will have to drive them a little longer but the tread is in good shape. Previous owner was about 65 so he must have not driven too aggressively.
Thanks for any responses/comments.
Steve

They should be at 30# when cold.

30lbs cold!

Always.
19 psi seems almost dangerous to drive on unless they're run flats, and then there must be a leak somewhere.

I'm surprised that the Tire Monitoring System didn't raise some flags at the low pressure. Is your system working?

Jeff

C5 Z06's did not come with TPMS.
..

Yep...30lbs. cold.

30 PSI is the factory recommended pressure, but there is no reason that you can't make some adjustments to suit your personal preferences. I wouldn't go below mid 20's or above max recommended pressure on the sidewall,but there is really nothing about 30 that is hard and fast.

Just monitor your tire wear to avoid prematurely wearing out your tires.

30psi cold will give you the best tire wear and fuel mileage, combined, in normal everyday driving.