Oil temp gauge and Temperature Testing

[herbie]

I bought the same oil temp gauge as Jerryhawk and installed it a couple of weeks ago. It's a pretty easy install but the tiny wires are kind of a challenge to work with. It seems to work real well and doesn't do any erratic movements. I have mine set to volts, oil temp and ambient air temp. I plan on doing a few different tests with oils to see if different oils will decrease or increase temps. It will take some time and I will update this as I do the tests.

The oils I plan on using
1) Rotella T4 15w40
2) Rotella T4 15w40 with 3oz Lucas oil stabilizer
3) Honda GN4 20w50
4) Rotella T6 5w40 Full synthetic
5 Mobil1 Racing 4T 10w40 Full synthetic

In my first test I rode the bike almost 500 miles on 15w40 Rotella T4 dino oil.
the ambient air temp ranged from 78-86 degrees. I will do my temp tests in the 55-60mph range and also the 65-70mph range.. The in town and idle temps were running too inconsistent as I idled more at times than others, so I won't include those temps.

First test; ambient temps 78-86 degrees
55-60mph 65-70mph
176-181 degrees 187-194 degrees

I drained the oil today and refilled with 15w40 Rotella T4 dino oil and 3oz of Lucas oil supplement. I will report back after 500 miles.

Second test ; ambient temps 78-89 degrees
55-60mph 65-70mph
168-183 degrees 172-185
I cut this test short because I feel the shifting was getting a little more difficult towards the end of the run. I had close to 300 miles on this oil.

I drained and filled with Honda GN4 20w50 oil and will go another 500 miles on this oil.
75-86 degrees ambient
55-60mph 65-70mph
163-181 degrees Didn't run enough interstate tests
Because of the oils good performance I am keeping this oil in for another 500 miles.