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For the money you spend on the Harley stuff, which is a synthetic blend by the way, you can buy Mobil 1 full synthetic which in my opinion is a superior product. It is also available at most any auto parts store and some Wal-Marts. You can use the automotive stuff in the engine. I prefer the gear lube, 75-90 in the tranny. Don't use auto stuff in the primary because of the clutch. You can pick up a quart of Shell Rotella T in 15-40 for that.
 

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I use Amsoil 20/50 in all holes on the bike since 20k miles . I'm now at 99k miles. I noticed an immediate drop in rpm at speed and a quieter engine.
 

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I noticed an immediate drop in rpm at speed and a quieter engine.
Can I call :cowdung On this part of this? it is not possible to have lower RPM's at a given speed!

Lets take 25 mph and lets say 2000 RPM's just as an example (this maybe different with each bike each transmission different gearing what ever its just an example). Your speed will always match the same RPM's all the time.

When in gear the engine clutch and transmission are all engaged which prevents any change in speed to rpm variation the type of oil you use will not raise or lower rps for any specific gear to speed ratio.

what it could do is raise fuel milage because less friction creates less resistance which makes your engine use less fuel to create the same amout of power.

Now 2 gears can have 2 different rpms for the same speed depending on if you are on the high side of the lower gear or the low side of the next gear but still the high rpm and low rpm will always be the same MPH it don't change.

the only way this is possible to have a different rpm than speed is if your clutch is slipping and your engine is racing but your speed would always be lower than rpm in this situation. unless you were going down hill with no throttle and your clutch was slipping then your speed would be faster than your RPM

sorry for the wall of text.
 

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The Northern Redneck
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7,170 Posts
I use Mobil 1 synthetic in all 3 holes ...major difference....runs substantially cooler too....I have EVO temps on a Twin Cam...and it costs a little less than Amsoil...get it at Autozone... $9.59 / quart
 

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HERD #00021
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$40 a gallon just seems outrageous to me

wonder if you could get a disahcount by the barrel :)

but it do do's the job it was meant to
 

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" BAGGERS RULE "
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200 Posts
Used Syn3 in all three holes and glad I did. 5th gear Whine quieted down and most important Engine definetly ran cooler.
 

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Here is a study done by a chemical engineer on oil for motorcycles, if you want read the whole site the link is at the bottom

AMSOil, Motul 5100, Mobil-1 MX4T, Mobil-1, Redline, and Golden Spectro are apparently made with high quality additive packages, similar to the commercial synthetics. Personally, I would find it reassuring if these oils were CI-4 certified. However, many motorcyclists have used these oils for years with good results. They are all fine oils, and perfectly acceptable to run in your motorcycle. They are a bit on the pricey side. Delvac-1, AMSOil, Redline and Motul synthetics contain no petroleum oils - they're pure synthetic. To the best of my knowledge, all other synthetic oils contain some amount of Group III oil.

I'm also sometimes asked if it's ok to run non-Harley oils in Harley-Davidsons. In my opinion, yes. If you change your engine oil every 3,000 miles or so, you can run pretty much any decent oil. I ran Valvoline in my Harleys for 120,000 miles. For extended oil life or superior protection, I recommend AMSOil, Golden Spectro, Motul 5100 or Mobil-1. Harley recommends a 20w-50 oil, so Rotella or other synthetic diesel oils will not do. However, the 15w-40 diesel oils meet the same film strength standard as 20w-50 oil, and are just fine to run in your Harley. I'm told that the standard Harley oils are made by Sunoco, and the Syn-3 is made by Castrol. The Syn-3 Harley synthetic is primarily a Group III oil, and contains very little PAO or Diester stock. I don't consider the Syn-3 Harley oil either a particularly excellent oil, nor a competitively priced oil.

All About Motor Oil
 

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I {Heart} Hookers.
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Here is a study done by a chemical engineer on oil for motorcycles, if you want read the whole site the link is at the bottom

AMSOil, Motul 5100, Mobil-1 MX4T, Mobil-1, Redline, and Golden Spectro are apparently made with high quality additive packages, similar to the commercial synthetics. Personally, I would find it reassuring if these oils were CI-4 certified. However, many motorcyclists have used these oils for years with good results. They are all fine oils, and perfectly acceptable to run in your motorcycle. They are a bit on the pricey side. Delvac-1, AMSOil, Redline and Motul synthetics contain no petroleum oils - they're pure synthetic. To the best of my knowledge, all other synthetic oils contain some amount of Group III oil.

I'm also sometimes asked if it's ok to run non-Harley oils in Harley-Davidsons. In my opinion, yes. If you change your engine oil every 3,000 miles or so, you can run pretty much any decent oil. I ran Valvoline in my Harleys for 120,000 miles. For extended oil life or superior protection, I recommend AMSOil, Golden Spectro, Motul 5100 or Mobil-1. Harley recommends a 20w-50 oil, so Rotella or other synthetic diesel oils will not do. However, the 15w-40 diesel oils meet the same film strength standard as 20w-50 oil, and are just fine to run in your Harley. I'm told that the standard Harley oils are made by Sunoco, and the Syn-3 is made by Castrol. The Syn-3 Harley synthetic is primarily a Group III oil, and contains very little PAO or Diester stock. I don't consider the Syn-3 Harley oil either a particularly excellent oil, nor a competitively priced oil.

All About Motor Oil
I've said that, and I'm NOT a chemical engineer.
 

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Mind Not For Rent
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1,307 Posts
Not sure about Blackdog, but for me it's political, Citgo=Argentina=Chavez, nuff said!
Actually, it is: Citgo=Venezuela=Chavez, nuff said!

Argentina gave us the tango. Wouldn't want to taint the wrong country. :know
 

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Noel
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Actually, it is: Citgo=Venezuela=Chavez, nuff said!

Argentina gave us the tango. Wouldn't want to taint the wrong country. :know

Your sir are correct, What was I thinkin!!!?????:eek
 

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Mind Not For Rent
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