Well shadow... Cooler oil means jugs cooler, cooler jugs means oil is cooler...

Just get an oil filter relocation system and it will cool your oil a wee bit plus less mess when changing oil.

 

Oil is more important. Oil will breakdown faster if it's subjected to high temps.

 

I always ran an oil cooler on my shovels. Not so ,much on my evo's. My twin cam had one. Never had one leak and the one on my old shovel has been on there since 1979 with no issues. Oh and it's a Lockhart. The oils are alot better now days too.

 

i think these motors were built with heat in mind. just saying

 

I think even dino oil is about 20% additives.

OTOH, they started making them so a person can turn off the rear cylinder when idling.

 

I upgraded the engine on my 07 flhtc to a 103 HO from a 14 FLHX and after a year I adde$ a Ultracool fan assisted oil cooler, it’s still hot but it’s better with the oil cooler I know. When stuck in traffic or pushing it hard for a bit it seems like the perfdkesnt go away as much as it use to.
Nothing scientific here, just seat of my pants feeling after owning it for 15 years and putting 109000 miles on it.

 

If your bike is generating heat to the point it makes you uncomfortable while riding it, install one. I've had them in the past and they do help to keep the oil temp down. Is it necessary other than to keep you cooler while riding? I don't think so.

 

Added the Lockhart when new in 79, still shoveling
I believe oil coolers are worth the investment

 

I have several oil coolers... sitting in a box, in the shed. When I buy a used bike with one on it, I add it to my collection box. I don't remember ever seeing a harley engine severely damaged from not having one. Seen a few locked up from having a cooler that started leaking though.

 

Even when not moving oil coolers work to some extent as the oil still flows through the finned area. They dont work as good as when you are moving but even standing still they will cool your oil by at least 7 to 10 degrees