Oil cooler

Yes, very good info! Thanks Hotroadking. I should have called Mobil 1 and asked about this a long time ago, but thought they would just tell me to use the VTwin oil cuz it's a lot more expensive. $12+ /qt (a.k.a. "more profit") in the fancy bottle.

Read a report put out by Amzoil a while back, that tested and compared their oil to several others. In that test, Mobile 1 was rated as good or close to Amzoil in most categories, but it didn't specify if it was VTwin or reg. 20/50. Naturally, Amzoil was rated the best in their test.

I Had the moco oil in mine when I got it, They did the 1000 mile sevrice and put in the moco oil. I have a laser thermometer I checked the cylinder temps. I don't recall the exact numbers, At the next oil change I went to the Amsoil 20w50 oil, The cylinder temp dropped about 20 degrees.
I tried the mobil 1 20w50 Vtwin, same temps as moco oil. Engine sounded different, raspy and dry.
Tried some other synth oils all where about the same or slightly better than the moco oil. I went back to the Amsoil, bike runs beter and cooler. Helps the fuel milage too.
I feel safer using the reccomended 5000 mile oil changes. The moco or other dino oils I won't go over 3000 miles.

I noticed that same sound you're talking about when I rode a new Road Glide last weekend. Since it was a factory demo, I mentioned it to the H-D rep that was maintaining them for the event, and he said it sounded normal to him. My bike has 42,000 miles on it, and it sounded much quieter--no mechanical noise coming from lifters, valve train, etc.

I don't know if it's the oil I'm using, or if those demo bikes are just hammered harder by all the different riders and the engines are "looser".