Has anyone measured the primary oil temperature on a hot summer day after riding?

Question pertains to viscosity of primary oil at normal operating temperature using, 20W50 motor oil, 75W90 gear oil or H-D Formula+ or H-D sport trans oil.

Lots of data on engine oil temperature.

 

Nope!

 

I don't think the primary creates a lot of heat on it's own, it's temperature would be regulated by the engine temperature.
I know when I switched to Amsoil synthetic in the engine and primary my engine temperature dropped by 20 degrees, I bet my primary dropped by a similar amount but of course I have no way of knowing for sure.

 

How do I measure the temperature of the engine?

 

Oil temperature gauge in the oil tank.

 

It's best if you don't!

 

After riding and getting the engine oil temperature up to operating, is it possible to place bare hand on chain case cover?
140F is high threshold for most.

 

Someone once mentioned to me that when they come to a stop and put their left foot down, sometimes their lower calf presses against the derby cover. It seems that it's not hot enough to burn them through their jeans. Now if bare skin, I would not want to find out through actual experiment.

 

But this is the temperature of the oil after it has passed through the engine. If you switch from brand X oil to brand Y and that thermometer registers 20F lower, shouldn't you conclude that brand X was able to extract MORE heat than brand Y? I'm not trying to start any argument; I'm just wondering. I have no answers, only questions.
Yeah, I've resigned myself to that idea by now.

 

"You dont need to monitor your engine oil temp...", and other bad advice such as "you don't need an oil cooler", "use a key to turn off a bike and not the kill switch, especially on keyless bikes that don't exist", and "you can't rev an efi xl to 7000".. Brought to you, in part, by the hive mind of opinionated wrong information.



yes, i get that it was a joke. Not everyone does.... what was that bs cHarley dropped before turning around and saying something was the service manual and it wasn't and later said he got it from shriners. ... something like "for those who may read this later"

just saying.