Oil cooler

[Bill Harland]

In need of a good oil cooler, for a 2006 road king
what's the best way to go, Harley, or fan assisted ?

[Grayrider]

Harley cooler will drop about 20 degrees.
Fan assist another 10 - 15 degrees.
That's what I found on my 97' Heritage, 1340. 

[jmb79]

Jagg oil coolers.  They have both fan assisted and ones without the fan.

[BVHOG]

Got a 2 into 1 pipe?  If so then the moore sensible products cooler is one that actually works.

[chico]

Got a 2 into 1 pipe?  If so then the moore sensible products cooler is one that actually works.

Got his filter relocation kit also, both work great

[HDGearHead]

Oil Bud Cooler

[Templar2]

This is pretty much all you see once it is installed:

[Ken R]

In need of a good oil cooler, for a 2006 road king
what's the best way to go, Harley, or fan assisted ?

My experience is that both the Harley and aftermarket fan-assisted coolers cool about the same amount, reducing oil temperature by 20 - 30 degrees as long as the motorcycle is in motion or if the wind is blowing really hard.  But stuck in traffic with little or no airflow through the heat exchanger, little cooling effect was measured.  I put grain of wheat temperature sensors on my Fluke to compare inlet to outlet of my oil filter.  When no airflow, the cooler quit providing any significant oil cooling, the Delta reducing to less than 5 degrees.  As soon as air flow was introduced, the outlet temp began to drop, reaching a Delta of almost 30 degrees as compared to the inlet.  AND, it didn't take much airflow to do that.


I've considered adding a temperature-controlled fan on my stock oil cooler.


Ken

[chopper]

I run an older Lockhart 420 on my down tubes. Have for a lot of years (02 FXD) .
Fluke infra red temp probe shows a 15 degree drop... at a DEAD STOP. Makes sense when you think about it. Hot air rises, and you can sure feel the heat coming off it at a dead stop. Hot goes up and draws in colder from below.
  The reality is that you aren't going to be at a dead stop for a long time. When you're running down the road, your oil will be 20-30 degrees cooler. When you stop, it's going to take a fair amount of time to get that temp up to where it would be if you DIDN'T run the cooler.

fwiw, I don't run a thermostat either.