Primary Question?
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6th Gear
Joined: Jun 2008
Posts: 14
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From: Rockingham, NC
Primary Question?
Time for an oil change on my 08 Ultra. Been using Mobil 1 in Crank Case and Primary. I have several quarts of Amsoil I would like to use up - Any problems using the Amsoil in the Primary and Mobile 1 in the Crank Case? Both are 20/50.
Road Warrior
Joined: Oct 2006
Posts: 1,916
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From: San Antonio, Texas
I try to avoid synthetics in the primary because my clutch acts funny with them but you will get all sorts of opinions on this. For me, the best primary fluid I have used is the HD Formula+ but again, that's my opinion...
You can use it in the primary however I use rotella t 15w-40. It's cheaper and I've never had a clutch issue on any bike I've used it in.
The primary needs a fluid that has the JASO MA spec listed on the back of the bottle. Amsoil v-twin and mobil 1 v-twin both have that spec listed,so yes u you can use them,mix them,whatever.
It's not going to cause any issues no matter what anyone here says
The primary needs a fluid that has the JASO MA spec listed on the back of the bottle. Amsoil v-twin and mobil 1 v-twin both have that spec listed,so yes u you can use them,mix them,whatever.
It's not going to cause any issues no matter what anyone here says
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
Likes: 85
From: Nevada
Yes, I've been using Amsoil 20-50 in the primary for about 20K miles.
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