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post #1 of 16 (permalink) Old 06-16-2014, 06:06 PM Thread Starter
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Mobil 1 20w50

Can I use Mobil 1 20w50 in all 3 holes


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post #2 of 16 (permalink) Old 06-16-2014, 07:05 PM
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Hit the search button & you'll get 'ALL' the info you ever wanted & more. I'm not a fan of running engine oil in the trans & primary. A good gear lube in trans & HD Formula+ in primary.


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post #3 of 16 (permalink) Old 06-16-2014, 08:21 PM
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Agree on all points. The search function is very helpful.

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post #4 of 16 (permalink) Old 06-17-2014, 01:09 AM
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post #5 of 16 (permalink) Old 06-17-2014, 07:24 AM
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Originally Posted by Hillglide View Post
I'm not a fan of running engine oil in the trans & primary. A good gear lube in trans & HD Formula+ in primary.
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post #6 of 16 (permalink) Old 06-17-2014, 09:50 AM
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I use Mobil 1 20w50 V twin oil in the engine and primary and Mobil 1 75w140 in the trans and I never had a problem. I get my oil from autozone and if you look in the gear lube section you will see Valvoline 75w140 synthetic gear lube I have been using that the last few times I changes the trans fluid and it works just as good as the Mobil 1 gear lube and it cost less.
I never had a problem with the Mobil 1 20w50 V Twin oil in the primary either, my bike is a 08 and I been using Mobil 1 V twin oil in the primary since the bike was new (6 years) and the clutch works just fine and it doesn't slip and it never needed to be repaired yet.


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post #7 of 16 (permalink) Old 06-17-2014, 09:55 AM
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Search to find your answers.

LET ME GOOGLE THAT FOR YOU.

http://lmgtfy.com/?q=HaRLEY+DAVIDSON...in+all+3+holes


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post #8 of 16 (permalink) Old 06-18-2014, 12:47 PM
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Mobil 1 20w-50 VTWIN in all 3 holes?

My street bob has over 45,000 miles on it with Mobil 1 20w-50 VTWIN in all 3 holes.

I agree that a proper gear oil (75w+) MIGHT be better? In the tranny.

However I ride the street bob HARD and it hasn't had unusual wear YET!

My FLTRU is getting Redline Shockproof in the tranny on the next change. I like that it's pink (easy to spot leak) AND the reputation is EXCELLENT.

Something to think of:

Heavy gear lube in trannys is OLD school technology.

These trannies were designed from the cad cam design for fine tolerances and 20w-50, straight 50 and straight 60 weight oil.

Modern pickup trannys are running ATF or lighter fluids going on 20 years. Transfer cases run atf going on 20 years now as well.

Heavy weight oils are even being replaced in semi truck transmissons and rear ends and in gearboxes for wind turbines and generators that weigh upwards of 25 tons!


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post #9 of 16 (permalink) Old 06-18-2014, 01:29 PM
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Here we go again LOL

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post #10 of 16 (permalink) Old 06-22-2014, 12:31 PM
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What Hillglide said.

M1, F+, RLw/SP here.

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