You must consult your vehicle's repair manual or a reliable online source like a Haynes or Chilton manual for the correct torque specification. Using the wrong torque can lead to leaks (too loose) or stripped threads (too tight).
Searching online for "[Your Year Make Model] oil filter adapter torque spec" will likely yield the correct information. For example, "1970 Chevrolet Camaro 350 oil filter adapter torque spec" would be a more precise search.