Personally, I would Not change oils indiscriminately..
I would find one that is Used by the many and Stick with the winner...
I also would recommend that the oil states it is for v-twin or air cooled engines...
Many years ago, I switch to Redline products and have had Very Good results.
20/50 redline
MTL for the Primary
Shockproof for the tranny
Redline being one of the Best fully synthetics on the market.. IMO.... they make the best tranny lube::: Shockproof Heavy gear oil..
Try this (or spectro) oil as the Masses here on the site use these products and they are Time Tested for Good results..
signed....BUBBIE
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One more question what oil does the dealer offer that is good for the bike. I bought the full maintenance plan and I thought they would pay for all fluids. Also how is the castrol full syntec for motorcycles they sell at Walmart.
A friend bought the full maintenance plan, He does use the syn3 in the motor and Formal + in the Primary chain case(clutch) BUT He supplied his own Quart of Tranny gear oil when HD finished the 1000 mile change..
Yes he gave them a quart of ""Redline Shockproof Heavy"" to put in...
Harley says to change out the transmission at 20,000 miles and he Liked what the Redline did for my bike, so he furnished a Quart of Redline for HD to install..
No big expense using a better product like that... and not being changed for 20,000 miles No Big-E even when it is changed out on the Plan.. 20,000 miles later...
If you want, You can do the same thing. Just bring in a quart of red and ask them to put it in..
signed....BUBBIE