Red Line MTL question ?
Many, many Harley folks have been using MTL in the primary for years because of its good friction qualities for your clutch, being a Manual Transmission Fluid.
The rough equivalents are (Engine oil on left, gear oil on right)
SAE Engine Oil = SAE Gear Oil
10w thru mid range of 20w = 75w
Mid 20w thru mid 30w = 80w
Mid 30w thru low 40w = 85w
Low 40w thru 50w = 90w
60w up = 140w
EZ
Hi all ! I bought a couple of qts of the RL MTL for my primary (bought an extra qt for next change) and i was wondering if it came in dif weights ? The qts i have say on the side of the label that its API GL-4 Gear Oil / SAE 70 W 80, and was wondering if this is what everyone else that uses the RL MTL was using (same weight ?) ??? I also picked up 2 qts of the Red Line Shockproof Heavy for the tranny and bought 5 qts of M1 V-Twin 20 w 50 for the crank, but may return it to Autozone and go with the Amsoil.....just not sure yet ???
Any 75w90 or heavier synthetic gear oil is best for the tranny, although going to a 85w140 in 6-speeds will likely quieten the whine and clatter somewhat. It did for mine. A good ??w50 synthetic engine oil is probably okay, too, but I prefer to think a gearbox should take gear oil.
hey Dawg why do you wanna take the mobil 1 back?????????????????
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IF using expensive lubes causes you to give up two packs of cigarettes, you should buy the stuff in bulk and give up several cartons. That is a benefit I hadn't even thought of!
EZ
The Best of Harley-Davidson for Lifelong Riders
Agree with what iclick said, just wanted to clarify that IF you are using Redline, MTL is the correct one for the primary rather than using the trans or engine oil. A plain thirty weight dino will do just fine too.
IF using expensive lubes causes you to give up two packs of cigarettes, you should buy the stuff in bulk and give up several cartons. That is a benefit I hadn't even thought of!
EZ
1. It has NO moly to coat the clutch plates
2. It is a top shelf GroupV synthetic gear oil (only4 bucks more)with a pour point of 5w30 motor oil so it doesn't cause the clutch todrag when the bike is cold
3. I can goall yearon 1 fill and not worry about exceeding it's limits because YES it's overkill and I like overkill and don't wish to have to worry about the lube in my primary since it's a pain in the butt to check it. Easy to check the engine & trans but when I close up my primary...I'll pay $4 to forget about it........but that's just MHO
Oh yeah almost forgot.......there is only one weight for MTL and YES it's fine for the primary.


