There is a tremendous amount of incredible information on this [email protected]: BUT with that being said I use it as a source of entertainment as much as information. I have found the answers to many questions on here. Like codes that flash across when there is a problem with the bike. I printed off a wonderful list. Fixed the problem myself and saved myself a ton of money not to mention hours at a stealership waiting for a diagnosis that I can do myself. Now the problem comes if any one out there places a lot of strength on the type of oil used from the polls on here. Usually, now not always, most of those using these web forums have a problem or are trying to find an answer and are a strict do-it-yourselfer. I praise anyone that works on their own bike, provided they have the time. Now I am not trying to step on toes, I have no clue which oil is the best to use. But But But as a pharmacist I read multiple clinical journals looking at clinical trials trying to wade thru the bullshittt that is reported. Many times a great in statistics can crunch numbers and prove anything. One of the most important things to look for in clinical trials for drugs is the reporting of relative versus absolute risk reduction. Absolute is much more important to know. I say this because i use the same school of thought in pharmacy that I do in motorcycles. Reporting data is reporting data. Now if you only have 2000 documented cases of a particular disease to test a new drug on then thats all you have. BUT there are millions of air cooled V-twins out there either S&S or Harley alone. Now there is no way to draw conclusions that most are using AMSOIL or Mobil 1 or whatever when only 2000 or less have participated in the survey. The numbers are too low. We need at least 20,000 or 50,000 would be even better. I would bet that 90 percent of all those using Syn3 arent reporting on here, even those using regular 360. Thats because most riders that take thier bikes in for service at their dealer arent on this site. They take their bike in for repair and would call the dealer for answers before looking up something online. I have asked several guys in a Harley shop and none of them use the net for Harley unless its ordering a part or making reservations for a Harley rally. Hmmm...think about it. Last fall when I had several hours to kill I hung out at the back of the shop of my local stealership and asked the guys what they were using. A couple used AMSOIL, a few here and there Mobil 1 in their tranny and Syn3 in the engine and Formula + primary. But for the most part the clear winner was one of two ways. Syn3 all around, or Syn3 in the engine and primary and formula + in the gearbox. Now other variations existed including the use of Formula + in the trans and primary and syn3 in the engine. But the winner by far and verified by the dealer was Syn3 all around. Dealers have a lot of influence on this they love to sell their oil and make money. I myself dont use Syn3 all around. Engine oil was never made for a gearbox. Never has been and never will be "most likely". I dont have an answer for you except I dont agree with the numbers online here as to what the majority of guys are runnning in their bikes. This has turned into a long thread but I have a lot of time to chat on here and love to share things I learn. I own two bikes one harley and a hayabusa drag bike. I would never use dino oil in my drag bike except for the break in period as requested by suzuki. After break in I switch to synthetics because I keep a bike I like for years and years. I dont plan on having to go inside that engine either for years and years. By that I mean 10 to 15 years and no internal engine work at all.