I don't have a temperature gauge but the oil pressure gauge will give a good indication of when the oil is warm.
On a freezing morning the coolant temperature on my fire bird will come up to operating range from a cold start after about 6 miles. The oil pressure doesn't drop into the normal pressure range until at least 10 miles.
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1985 chevy camaro mostly stock.