What Type of Oil
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Tourer
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What Type of Oil
Does anyone know why everyone seems to think its ok to use GL5 rated oil in the transmission of a twin cam 88 motor. The only info I can find in the owners manual is the part number for the oil that should be used, 99891-84 or 99892-84 and both of these only tell you if it is semi syn (syn 3) or mineral oil (HD 360) ?? So where does the info about GL ratings and viscosities for H.D. Motorcycles come from??
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peter
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peter
Last edited by 1peter; May 19, 2009 at 04:05 AM.
Road Warrior
Joined: May 2009
Posts: 1,945
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From: Victoria, Australia
peter, you may want to have a look here for the different GL grades and the areas of use.
http://en.wikipedia.org/wiki/Gear_oil
I use various good quality gear oils in the 75-90 wt range (depending on price at the time) for my Evo trannys in which HD says Syn 3 is fine as well as for twin cams.
Valvoline makes a semi syn brand called DuraGear which is well priced here in Australia and works fine for me. Any good quality shear stable gear oil will do the job nicely.
I wouldn't use pricey Syn 3, when with a bit of research you will find as good or better for less $$$.
Just my thoughts--
V2
http://en.wikipedia.org/wiki/Gear_oil
I use various good quality gear oils in the 75-90 wt range (depending on price at the time) for my Evo trannys in which HD says Syn 3 is fine as well as for twin cams.
Valvoline makes a semi syn brand called DuraGear which is well priced here in Australia and works fine for me. Any good quality shear stable gear oil will do the job nicely.
I wouldn't use pricey Syn 3, when with a bit of research you will find as good or better for less $$$.
Just my thoughts--
V2
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
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From: USA
Does anyone know why everyone seems to think its ok to use GL5 rated oil in the transmission of a twin cam 88 motor. The only info I can find in the owners manual is the part number for the oil that should be used, 99891-84 or 99892-84 and both of these only tell you if it is semi syn (syn 3) or mineral oil (HD 360) ?? So where does the info about GL ratings and viscosities for H.D. Motorcycles come from??
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peter
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peter
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
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From: USA
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Road Warrior
Joined: May 2009
Posts: 1,945
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From: Victoria, Australia
[quote=1peter; Mobil 1 75-90 would be my choice but in Australia you can only buy it in 20 litre drums.[end quote]
Hi Peter, I used to run this in my '96 Special-- really nice lube but pricey. I adopted the policy a while back of "change motor oil; change primary fluid" and as I change fluids at 3000ks (approx 2000 miles) I went back to dino fluids W/ exception of the tranny where I run semi-syn valvoline 75-90 and change at 6000ks.
Cheers,
V2
Hi Peter, I used to run this in my '96 Special-- really nice lube but pricey. I adopted the policy a while back of "change motor oil; change primary fluid" and as I change fluids at 3000ks (approx 2000 miles) I went back to dino fluids W/ exception of the tranny where I run semi-syn valvoline 75-90 and change at 6000ks.
Cheers,
V2
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