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> FXR oil, What type of oil is best for an '84 FXR?
Pod
post Feb 16 2016, 05:47 PM
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My father in law has an '84 FXR. He has over 150k on that bike and recently had parts of the motor rebuilt. I don't know all the exact details but I don't think I need them all for my question. He told me that from time to time his oil light comes on for no reason and goes out. I asked him about the type of oil he is using. He said he was using 5w-30. I could not believe it. I said your oil is probably getting way too thin and that's what is happening. He agreed he should change it. I mentioned that I use Lucas and Amsoil in my bikes. He said he has been using Castrol oils since the 70's and it will take some convincing to get him to change. He also mentioned that the guy who rebuilt recommended a type of aviation oil. I could not believe the stupidity. Oil tech has come a long way since the 70's. Would you use motorcycle oil in a plane? Why would you use it in a bike when there are oils designed for bikes? While Castrol probably makes great oil, its not specialized for bikes. I just want a experienced rider to give me some advise on what kind of oil he should be running. Maybe I should not care so much about this, but one day that bike will probably be mine and I want it taken care of.
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Night Rider
post Feb 16 2016, 06:19 PM
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You will get LOTS of opinions ...




Me ... HD oil that is 100% designed to work with my bike is my only choice




As the lead engineer for HD Big Twins explained to me once over beers at his house that HD oil is designed for one task ... take advantage of that...




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Blackcloud
post Feb 16 2016, 06:49 PM
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Either HD oil or Mobil 1 for V-twins or since he likes Castrol so much, he could use Castrol for V-twins.

CASTROL V-Twin
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Sick_Puppy
post Feb 16 2016, 07:07 PM
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I've run many miles on my 84 FXST on 20-50 dino oil. Aero oil is good stuff if you can get it in the right weight. It's claim to fame is it leaves the rocker arms extremely clean, expensive thou.
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Bamsambo
post Feb 16 2016, 07:23 PM
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(IMG:style_emoticons/default/stupid.gif) Never run less than 50W in a Harley. I run 20-50 Castrol Dino in my '04.
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Fgowi
post Feb 16 2016, 09:24 PM
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Amsoil. At least a synthetic. Those are just plain better lubricants. Syn has NO contaminents. The chemical make up allows all elements to be exactly "round". Justy plain slicker!! Dino's molecules are irregular and full of contaminents.




Syn will withstand higher temperatures without breaking down. Everything will run significantly cooler.




Having said that, dino is fine if you change it more regularly.
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Bamsambo
post Feb 16 2016, 10:26 PM
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QUOTE(Fgowi @ Feb 16 2016, 09:24 PM) *
Amsoil. At least a synthetic. Those are just plain better lubricants. Syn has NO contaminents. The chemical make up allows all elements to be exactly "round". Justy plain slicker!! Dino's molecules are irregular and full of contaminents.
Syn will withstand higher temperatures without breaking down. Everything will run significantly cooler.
Having said that, dino is fine if you change it more regularly.



Damn Bruce, you sound like Ordy. I've changed my oil at 3K all my life without a problem. Kinda like plastic guns, don't trust it.

This post has been edited by Bamsambo: Feb 16 2016, 10:27 PM
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Fgowi
post Feb 17 2016, 08:24 AM
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(IMG:style_emoticons/default/hysterical.gif) You change every 3K. No worries!
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Jarhead
post Feb 17 2016, 09:09 AM
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Asking oil brand advise is like asking blonde or brunette everyone has a opinion, I spent a lot of hours reading up on oil and trying to get past the hype and advertisement and right or wrong I've settled on Mobil 1 full syn for V twins.

That said I doubt there is any appreciable difference between name brands and or HD oil.
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Fgowi
post Feb 17 2016, 08:07 PM
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Good choice. And, you're right, Greg. I've done a lot of reading too. Some really good independent studies on the topic.
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afterburn549
post Jul 6 2016, 12:03 PM
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When you wish to learn other people's opinions, that is what you will do and hear.
If you take time to do the research, then and then only will YOU know or sure.
Start with "bob the oil guy" for oil 101 and work from there.
I have spent about 20 hours on the subject (recrently ) not ultimately .
This is what the paperwork says by other oil lab admissions-
AMS oil has the highest PSI protection .( https://540ratblog.wordpress.com/2013/06/20...r-test-ranking/ )
Next oil viscosity, - @ 150deg it is zilch compared from one weight to another.
The oil light on the Harley HAS to be verified by an out side source such as a temporary add-on gauge and sender .
It very well could be s short , bad sender, ETC.
KISS
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