Coolant temp gauge AOK, and good to be able to watch thermostat and cooling fans doing their stuff!

Fitted the sump oil temp sender yesterday, into the M16 "second sump plug" port on the rear face of the ali (A/C) sump.
Single wire direct to pin7 on the 10-way.
Oil temp gauge slow to show anything. Needle lifts away from 'off' (similarly to the to other gauges) when IGN is turned on, but moves no further. QQ: How slow is oil temp to climb?
And (for test purposes), does anyone know the resistance values for the oil temp sender (OE 0242 50, Facet 7 3099, FAE 32080 etc) ?
I metered it before fitting, and it showed just over 3K at 18°C, but I don't have any other NTC figures.