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Lubrication and Lubricants You guessed. Here is where everyone can argue over oil.

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View Poll Results: What synthetic oil brand do you use in your cars or your bike. You choose more than 1
Amsoil 342 24.43%
Mobil1 539 38.50%
HD SYN3 291 20.79%
Royal purple 59 4.21%
Shell 16 1.14%
Castrol 83 5.93%
Penziol 13 0.93%
Other 217 15.50%
Multiple Choice Poll. Voters: 1400. You may not vote on this poll

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  #451  
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Tomcatt Tomcatt is offline
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Originally Posted by Toejam503 View Post
...less Zinc and Phosphorus to preserve the catalytic converters...
That's where this all started. What they can't use because of catalytic converter conflicts. That's when "friction modifiers" became a buzz word like it was a cure all. The guys running flat tappet (non-roller) performance cams promptly found out it's not.
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  #452  
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Redline they even have a vtwin service kit
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  #453  
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Originally Posted by burely View Post
Redline they even have a vtwin service kit
Read what that kit contains. It's Big Twin oriented. I get Redline 10w-50 a case at a time because I can run it in my Sportster and BMW. The Sportster gets GL-5 gear oil for the primary/trans and the BMW gets heavy shockproof for the trans and final drive.
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  #454  
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Originally Posted by klown View Post
Synthetic is obviously better, so what brand does everybody use. I'm wondering what the most popular brand is. I have a suspicion that Amsoil is not very popular, just because you can't get it as easily as the others.

I read where SPORTSTERS are known for noisy motors ...I haven't used synthetic since I solved my noisy motor on my Road Kind 5 or so years back. I'm using a good quality conventional oil with good success.
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Originally Posted by Tomcatt View Post
Read what that kit contains. It's Big Twin oriented. I get Redline 10w-50 a case at a time because I can run it in my Sportster and BMW. The Sportster gets GL-5 gear oil for the primary/trans and the BMW gets heavy shockproof for the trans and final drive.

yes im aware comes with transmission fluid and couple extra quarts of 20w50 (my BMW also calls for 20w50 so can use the extra)
90$ even shipped on amazon give the hat to friends for xmas/birthdays lol
and can you really have to many funnels
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  #456  
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Since oil is at it thickest at room/garage temperature....wouldn't it make sense to actually have a 20w-75 so oil would be thicker at 100 degrees centigrade?
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Originally Posted by glbsportster View Post
Since oil is at it thickest at room/garage temperature....wouldn't it make sense to actually have a 20w-75 so oil would be thicker at 100 degrees centigrade?
That is the reference temperature for the 75 part of your 20w-75. The problem isn't being thick enough at higher temps, it's having oil thin enough at lower temps. Even the 0w's aren't thin enough.

Formula 1 engines which are arguably at the peak of current state of the art run on 0w weight engine oils. By that I do mean 0w not 0w-something.
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Originally Posted by glbsportster View Post
Since oil is at it thickest at room/garage temperature....wouldn't it make sense to actually have a 20w-75 so oil would be thicker at 100 degrees centigrade?
depends on the additive pack what temp it works best at. your engine has pressurized oil with a 75w could damage oil pump ect and crank slow.
15w40 or 5w 40 diesel rated would be good rottella ect have 1200ppm zinc most api energy saving oils like car oils and sythetics have 400ppm or less these days roller lifter/rocker arms engines can get buy with a lot less zinc.

cycle engines with transmission that share engine oil need lots of zinc evo sportsters share engine oil with transmission. as with almost all metric bikes
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  #459  
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Evo Sportsters do not share Engine and Transmission oils.
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My 09 sportster gearbox shares oil with the Primary drive.....the Engine doesn't share oil with anything. At 100 degrees centigrade 75 weight would be almost as thin as water....wont affect the oil pump at all and if it is rated at 20w it will flow like most other 20w oils will at startup
....

Last edited by glbsportster; 3 Hours Ago at 02:47..
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