Here's a test a guy did on two seperate days between oil and water on his scoob.The test were done in winter last year and i assume mechanical sympathy was given to the car in driving,ie:not redlining it

Here's today's test. It wasn't frosty this morning which i think shows in the test compared to yesterdays

Yesterdays test followed by todays

@ 1.6 miles the car showed normal water temp.
@ 1.7 miles the oil gauge registered 50c
@ 2.1 miles the oil was 60c
@ 2.8 miles the oil was 70c
@ 3.7 miles the oil was 80c
@ 8.6 miles it finally hit 90c

@ 1.2 miles the car showed normal water temp.
@ 1.3 miles the oil gauge registered 50c
@ 1.8 miles the oil was 60c
@ 2.6 miles the oil was 70c
@ 3.6 miles the oil was 80c
@ 8.3 miles it finally hit 90c