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dbmg
Guest
I use Formula + in the tranny and the primary of my 08 EG Classic and Amsoil Syn in the engine. I was told by several techs to run the Formula + in the Primary because it's better for it.
Spectro is great for the transmission.
My HD dealership said if you run Spectro in the tranny, you only need to change it every 3 years, if Formula + then change it once every year.
The Formula + in the primary, change every other oil change.
If you're ever going to get a leak from the primary Synthetic will find it.
If service yourself then I would just change all 3 every service interval at 5,000 miles. You can never over maintain your bike. I disagree with the time table your dealer is using. Some guys ride many thousands of miles a year and the time table does not make sense...IMO