oil pressure question for a 1966 DJ-5 (f head 134)

[suncatcher]

We have a 1966 DJ-5 with a 134 F Head and are using it daily. I notice that the oil pressure is at around 60 when we start out but decreases to around 20 after driving for a half hour or so. What pressure is normal and if this isn't normal how can I correct it. Thanks, Suncatcher

[Carl3]

Sounds normal

[Go Joe]

It's normal for oil pressure to drop once an engine is good and warmed up. 20 psi is nothing to worry about.

[bpd303]

I ran into the same problem during hot weather. Changed oil to 20W50 and the oil pressure improved when the engine warmed up.