Red Line V-TWIN PRIMARY OIL VS ?
Road Master
Joined: Apr 2008
Posts: 897
Likes: 10
From: Oregon
well it doesnt really say what its wt is, but it "compares to and performs like a 75-250" is what i remember it saying on the bottle. also i am told the regular redline Heavy Gear Oil with Shockproof is heavier than the Vtwin Transmission oil with Shockproof. I cant really tell a difference they are both about the consistency of yogurt trying to get it in the hole. my tranny is definitely quieter with it though.
Road Master
Joined: May 2008
Posts: 766
Likes: 3
From: SoCal Desert
Arizona - I haven't used Redline in my HD, but I did switch to the Amsoil and noticed a significant reduction in engine heat. I also switched to Severe Gear 75-90 and it smoothed out the shifting some too.
Grand HDF Member
Joined: Mar 2008
Posts: 4,996
Likes: 655
From: bklyn,ny
.Lately i use amsoil universal sythetic atf and their 75-110 gear lube in the tranny. I was not comfortable with 75-90 in hot weather,and i think the 75-140 is just too heavy to shed heat quickly.
Club Member
Joined: Feb 2007
Posts: 5,335
Likes: 0
From: Tidewater
I have been using Redline in all bikes and cars for a few years. I think there is a significant difference and like others said a few extra bucks protecting the engine and tranny is worth it, to me anyway!
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Road Master
Joined: May 2008
Posts: 766
Likes: 3
From: SoCal Desert
I live in the Mojave desert where we'll see many miles in 110 plus temps, and the 75-90 works fine.
Road Captain
Joined: Oct 2008
Posts: 560
Likes: 0
From: So. California
mobil 1
I do not have any doc to back up the Mobil One/ SE Syn oil, but I was told this info. from the guy that Dynoed my bike @ my HD dealer. I asked a service manager at another dealer about it and he said that he had heard the same thing. I put a small amount of ea. on a piece of glass and could not tell the difference myself. I hope that I am not wrong on this one, just going off of what I was told. He also said that the different manufactures of oils bid on getting the contract every couple years. So, hopefully he knows more than me.... 
Sorry if I end up wrong on this one...
Sorry if I end up wrong on this one...