Synthetic Oil, how many miles?
Sorry for the dumb question. [&o]
Thanks.
Many I know justify the difference in cost by going 5K and Amsoil seems to agree
I run 5000miles on synthetic. Most of my friends do. Haven't heard that it's a problem.

And regardless of what type of oil you us the same amount of dirt and carbons gets into to your motor.
So in conclusion, Syth give you better protection but should still be changed just as often, usually 3-5000 miles.
yes I know many people disagree, but they are wrong. I spent over 10 years in the oil change business and Syth oil comes out just as dirty as regular oil after the same amount of miles.
Oil cleans, cools, and lubricates. You can't clean the dirt out if you don't change the oil.
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The Best of Harley-Davidson for Lifelong Riders
Running the same oil in all three holes, if it's a good product like Amsoil or Mobil 1 is not a problem. Some HD dealers refuse to use product you bring to them for service, so I just do it myself and keep the receipts and records...saves money, and keeps the kids they have changing oil at the dealer from getting their hands on my bike, plus it gets you familiar with the bike and affords an opportunity to visually inspect things. Get the service manual for your bike, buy a good jack like a J&S...it will all pay for itself many times over, plus the jack makes life easier when cleaning the bike, checking the air pressure, etc. A few basic tools on hand is all that is needed for these basic services to your bike. If you're not comfortable doing the other stuff recommended, let the dealer do the 10K, 20K, etc, and do the between ones yourself. The only time a dealer touches my bike is for warranty items...I don't trust them to do things correctly, but if you've got a good one you can trust, good for you!! Indy shops can do all your services as well, and it will NOT void your warranty, in spite of what a dealer might say, so if you find a good Indy shop you can trust, go with them.


