Cooling fans lower oil temp by 10 degrees

Oil temperature is a good indicator of overall engine temperature. I know for sure that the Cool My Hog cooling fans lower cylinder head temperature (see previous blogs), but I was keen to investigate impact on oil temperature.

The tests:

Run 1: Engine thoroughly warmed up. Starting oil temperature 100oC.  Ambient temp about 26oC. Cooling fans off.
Ride around Sydney CBD for about half an hour.
Maximum oil temp: 126.7oC

Run 2: Starting oil temperature 105oC. Ambient temp about 26oC. Cooling fans on.
Ride around Sydney CBD for about half an hour – same route and riding style as run 1.
Maximum oil temp: 116.8oC

10oC cooler – that’s a good thing.

Looking forward to repeating this test on a hot day.