Wrong oil
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,092
Likes: 7,615
From: Poolville
Motorcycle oil has a different amount of zddp (zinc) it is used to help lubricate your rings and bearings. MC and Diesel Oil carry the same amount approx 1200 ppm and conventional oil only has 800 ppm. its all about emissions, however the higher the ppm the better the protection. air cooled motors do benefit from it.... One other thing , if you want to help clean up the inside of your motor you can always use 20% mixture solution of marvel mystery oil.
Last edited by 98hotrodfatboy; Apr 24, 2015 at 06:54 PM.
Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Motorcycle oil has a different amount of zddp (zinc) it is used to help lubricate your rings and bearings. MC and Diesel Oil carry the same amount approx 1200 ppm and conventional oil only has 800 ppm. its all about emissions, however the higher the ppm the better the protection. air cooled motors do benefit from it.... One other thing , if you want to help clean up the inside of your motor you can always use 20% mixture solution of marvel mystery oil.
Outstanding HDF Member
Joined: Nov 2013
Posts: 2,358
Likes: 34
Google the brand and zddp in the same line and you'll get a hit. The msds will give you the % not the ppm. There's oil with 4000ppm that would not protect your engine. Best to just pick a brand recommended and stick with it. Additives to increase the zinc will also cause harmful changes to the oil. Pick a recommended brand and stick with it is my thought.
Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Google the brand and zddp in the same line and you'll get a hit. The msds will give you the % not the ppm. There's oil with 4000ppm that would not protect your engine. Best to just pick a brand recommended and stick with it. Additives to increase the zinc will also cause harmful changes to the oil. Pick a recommended brand and stick with it is my thought.
Thread Starter
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Novice
Joined: Apr 2015
Posts: 22
Likes: 0
From: Arkansas
Lucas
Changed the oil with a quality brand of motorcycle oil and a quart of Lucas oil additive and my pressures are doubled. 10-12 at idle and 25-30 at highway rpm. Plus the blow by and smoke stopped as well.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,173
From: Oxford, Nc
My '98 Ultra ran 65,000 miles on Amsoil synthetic and had just started to weep (wet spot basically,) at the base of the rear jug when I sold it after 4 years.
(And my TwinCam with more than twice that mileage shows no evidence of weeping at all (Mobil 15w-50 & VTwin 20W-50.)
I wouldn't sweat it.
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