I just changed my plugs and oil on 2006 Electra Glide Standard with 7,000 miles on it. I used Mobil 1 oil, HD oil filter and HD plugs. The bike seems to have lost power and is a bit more sluggish. It seemed to be running hotter also. I have a big sucker air cleaner, V&H fuel pack and Rush 2.25 slip ons. My buddy said that the plugs didn't have to be gapped that the Harley plugs are already pre gapped. I didn't agree because the box said to gap according to your Service manual. So he just put them in ungapped. Maybe I am freak but the bike didn't have the torque off the line like it did and when I checked the oil when I got home the metal top to the dipstick was to hot to touch. If I am stressing over nothing then I am sorry but it just seemed different. I use to have HD synthetic oil in it. I thought putting the Mobil1 in would make the bike run a little cooler. Oh sorry I rode about 50 miles and the temp was 75. Any help would be great.