Lars, I have an 09SEUC with fulsac stage one map, K&N open air cleaner, Fulsac 1.75 Baffles, and no cat. On my way back from Canada I made had to go thru St. George Utah. It was at least 110 degrees out riding on freshly laid ashfalt. I had a lot luggage and a passenger. Approaching St. George my wife's right tennis shoe started to delaminate because of the heat. The bike ran fine. No extra noises. I use Amsoil straight 60 Wt racing oil and a HD filter. After we stopped at a store and got her some new tennis shoes we took a two hour break in an air conditioned restaurant. I don't recommend this. When I got out into the heat again I felt sick to my stomach. I think a shady spot in the breeze would have been a better choice.Anyways, got to Las Vegas and it was still 107 degrees out. So in conclusion I would say that we don't really need to worry about oil temp as much as everyone does. Naturally the level needs to be checked on occasion. I am lucky I guess because my bike uses very little oil between changes.. Regarding Evos I have one with an S&S 107 I have the dipstick gauge which gets up to 230 on a hot day (I am talking at least 100 degrees). Got caught in traffic on a ride up 99 to Fresno Ca. The lifters got a little louder at idle but otherwise okay. I think oil temp wise you guys will be fine on your trip . Watch out for the black squigglies on curves and also dead critters. Have fun. CAHDBIKER