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Old May 3, 2007 | 02:57 PM
  #11  
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Default RE: Oil temp

He said, "It don't mean ANYTHING unless it has a red arc to tell you when its to the overheating point."

So, if anyone has any info, I'll rub it in his face. But I think my gauge isn't a dumb thing at all.
It depends what you consider overheating. Dino oil will breakdown after about 250 degrees, while a good synthetic oil will breakdown after about 300 degrees. So for dino oil the oil is overheated after 250 degrees, but the engine is still doing fine.
 
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Old May 3, 2007 | 03:48 PM
  #12  
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Default RE: Oil temp

ORIGINAL: 1200c

Dino oil will breakdown after about 250 degrees, while a good synthetic oil will breakdown after about 300 degrees. So for dino oil the oil is overheated after 250 degrees, but the engine is still doing fine.
That is exactly the kind of info I was looking for. Oil overheating temp is good enough for me. Thanks 1200c.
 
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Old May 3, 2007 | 04:09 PM
  #13  
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Default RE: Oil temp

I have one of those temperature guages. I run synthetic and it typically varies from 170 to around 200 degrees.
 
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Old May 4, 2007 | 12:31 AM
  #14  
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Default RE: Oil temp

That is exactly the kind of info I was looking for. Oil overheating temp is good enough for me. Thanks 1200c.
If the oil temp goes over 250 degrees (even with dino oil) once in awhile, then you should still be fine. It will just affect the life of the oil and it should be replaced sooner.

Here is what Donny Peterson says about it:

As the accompanying chart indicates, the oil oxidation rate increases explosively above 250 degrees for fossil oil like that recommended by Harley. At 270 degrees, a mere 20 degrees above the 250-degree limit, the oxidation rate doubles, thereby reducing the life of the oil by half. Sustained riding at over 300 degrees reduces oil life by 80 percent.

Now don't flip out if the temperature rises above these figures for a short period of time, but change the oil if you're in doubt.

Link to the full article if you are interested:

http://www.heavydutycycles.com/lubea.htm
 
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Old May 4, 2007 | 01:22 AM
  #15  
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Default RE: Oil temp

Living here in the tundra I was thinking about getting an oil heater, I don't think those guages go into the negitive numbers do they? does oil still flow at -40 in a Harley? f**k I hate the cold!
 
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Old May 4, 2007 | 03:33 AM
  #16  
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Default RE: Oil temp

Living here in the tundra I was thinking about getting an oil heater, I don't think those guages go into the negitive numbers do they? does oil still flow at -40 in a Harley? f**k I hate the cold!
Probably not, but if you are riding in -40 degrees you have bigger problems than oil flow. Please get it on video before you die.
 
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Old May 5, 2007 | 02:29 AM
  #17  
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Default RE: Oil temp

just put a temp gauge in my sporty. temp stays around 160 when outside temp is 40-60 deg. 170-190 when outside temp is between 65-85 deg. and i use HD 20w50 but will be switching to amsoil next service.
 
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Old May 6, 2007 | 01:40 AM
  #18  
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Default RE: Oil temp

190-220 with mobile one.
 
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Old May 6, 2007 | 11:42 PM
  #19  
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Default RE: Oil temp

150 to 200, never over 200.
 
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Old May 7, 2007 | 12:20 AM
  #20  
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Default RE: Oil temp

Well I went for a ride yesterday and it was in the mid to upper 60s. I have regular 20w50 dino oil in it now but will be switching back to Mobil 1 V Twin synthetic this next weekend. My oil temp was around 210. I still don't see how many have such low oil temps unless my guage isn't accurate.
 
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