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I know this is over the top, but I am spending way too much time worrying about this for the 1k service on my '14 RK.
The dealer suggests putting Syn3 in the engine, and Formula + in the primary and trans.
I am thinking that Syn3 or Amsoil 20W-50 synthetic in the engine, Formula + in the primary and Amsoil Severegear 75W-140 in the primary.
The last thing I want is to become an oil expert, and I don't mind having the dealer do the work (Live in condo), but by the same token, I want the best I can reasonably get in my bike. Thoughts?
If it were me I would go with the dealer suggested fluids on the first couple changes then after you have a few thousand miles on make a change to another brand if you wish. What you are thinking of using is what I use but I did not make the switch until about 10k miles.
@2ropes, interesting that you suggest that.....my only issue is that a Harley dealer would naturally 'suggest' their products, and don't carry anyone elses...that being said, it may be the best way to go for now.....thanks.
You'll get a gazillion respondence but since ask I do Formula + in the primary and trans and Walmart brand Mobile-1 15w-50 past 2 Harley's works fine last long time.
Ask a thousand of us and you'll probably get as many answers/suggestions.
I have the ESP on my '13 CVO Ultra so I don't want to do anything that could invalidate my warranty. I use SYN3 20w-50w in the engine and primary (as required) but I use Red Line Shockproof in the tranny.
In really hot weather I may upgrade the engine oil to Red Line 20w-60w.
The main thing (IMO) is to use a premium brand of oil that is made for the V-Twin air cooled engine and change it as required and to never run the engine low on oil.
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