Today I rode with some friends. When we stopped for breakfast one of the guys has and '08 Ultra has a digital oil temperature dipstick like myself. I have an '03 Ultra. We both checked the temperature of out oils. His oil was 243 degrees and mine was 222. I am actually a little heavier than him by about 20 lbs. Now here's the thing, my engine is all chromed which ought to make it run hotter with that metal jacket encasing it. I have my lowers on and he took his off. Some old timer told me, and I took his word for it, that he found the engine ran cooler with the lowers on. My friend also runs Syn# in all 3 holes. I use Mobil 1 VTwin. I have read many times in this forum that a full synthetic will make our bikes run a bit cooler. I am beginning to think that might be the case here. Do you think: My lowers really are making a difference in cooling the bike, or the Mobil 1 is doing the trick, or is it possibly a combination of the two? Thanks.