Mobil 1 - Primary
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Road Master
Joined: Sep 2009
Posts: 911
Likes: 1
From: Orem Utah
Mobil 1 - Primary
I've been using Mobil 1 in my engine and tranny, but to date have stuck with the Harley Formula + in the primary. I like Mobil1 because it s great synthetic and I get it wholesale from from my son-in-law, so I'd like to switch to M1 in the primary also. After hours of searching and reading this section, it seems there is no concenses on which Mobil1 works better in the primary. I don't mind the Formula + but it's more expensive than M1 for me.
Thoughts?
Thoughts?
Road Master
Joined: Feb 2010
Posts: 862
Likes: 3
From: Henderson, Nevada
I'm using the Mobil 1 V-Twin in both my bikes motors, however stay with HD Formula+ in the primarys. Redline V-Twin transmission lube in the big twin transmission.
Last edited by Harleyboyddk; Oct 21, 2010 at 09:12 PM.
Road Captain
Joined: Nov 2005
Posts: 720
Likes: 6
Agree with staying with the Formula+ in the primary. You don't want a synthetic oil in the primary, the clutch plates just need a regular oil that is not an energy conserving oil or synthetic.
Actually you can use any dino 10/30-10/40-20/50 oil in the primary with no problems as long as it isn't an energy conserving oil.
Actually you can use any dino 10/30-10/40-20/50 oil in the primary with no problems as long as it isn't an energy conserving oil.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,207
From: Oxford, Nc
Sure it's fine, because it's overkill. None of the stresses that syn was designed to control in motors and trannys occur in the primary.
My 11 year old FLTRSEI just turned 86,000 miles last week. I run an M-6 chain tensioner and the cheapest 10W-40 dino in my primary that I can find.
Every component in there is original, includung the clutch plates.
( HD primary oil is just dino oil made by Sunoco. )
My 11 year old FLTRSEI just turned 86,000 miles last week. I run an M-6 chain tensioner and the cheapest 10W-40 dino in my primary that I can find.
Every component in there is original, includung the clutch plates.
( HD primary oil is just dino oil made by Sunoco. )
Road Master
Joined: Jul 2010
Posts: 798
Likes: 168
From: Tryon, NC Cape Vincent NY
I've been using Mobil 1 in my engine and tranny, but to date have stuck with the Harley Formula + in the primary. I like Mobil1 because it s great synthetic and I get it wholesale from from my son-in-law, so I'd like to switch to M1 in the primary also. After hours of searching and reading this section, it seems there is no concenses on which Mobil1 works better in the primary. I don't mind the Formula + but it's more expensive than M1 for me.
Thoughts?
Thoughts?
use it. If not , buy a conventional 20w50.
Ken
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Road Warrior
Joined: Mar 2011
Posts: 1,378
Likes: 2
From: Macon, GA USA
Mobile 1 works fine in the primary.
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Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
I'm having an issue now and I'll report back after the weekend. About a month ago, I switched from HD Syn3 oils to Redline in the transmission, mobil1 vtwin syn in the engine and mobil1 10w40 in the primary, all recommended.
My clutch is slipping with 16k on the bike now. I'm going to tear it down over the weekend and take a look-see at the clutch pack. Just find it ironic that it started after the mobil1 10w40 was put in there.
My clutch is slipping with 16k on the bike now. I'm going to tear it down over the weekend and take a look-see at the clutch pack. Just find it ironic that it started after the mobil1 10w40 was put in there.
