Synth oil definitely makes internet threads run hotter.

 

I've always said if a person has an engine that's running over 250 degrees, why would you not put on an oil cooler. Folks think they should just use synthetic which can stand higher heat, that is bad logic to me. I don't have the extreme heat issues, probably because the touring models have larger oil capacity.

It's interesting what you said about the cabs, that speaks volumns about the synthetic vs conventional oil debate.

I am done arguing about these false claims. If someone wants to make a statement like "synthetic makes an engine run 20 degrees cooler" then back it up with hard evidence. Lets see some lab data taken under controlled conditions. If it were true, which I don't believe it is, then there will be loads of data out there to prove it.

 

The only temperature-related studies I found were that the syn retained it's properties longer than mineral oils; the operating temps used in the studies remained constant, around 210 degrees I believe.
And just for clarity, all of the studies I cited were independently conducted to my knowledge; not funded by oil manufacturers.

One thing for sure, it's been a lively debate. Thanks Zeus for your input...

 

Ah, now don't get me started on Blinker fluid . . . Do you have any idea, just how many differences of opinion among legitimate self appointed pseudo-scientists there could be discussing the various ways of performing a mass spectrometer analysis of Blinker Fluid?

 

Deleted due to inconsiderate statement..sorry

 

My '09, stock 96'er, K&N inlet, Rinehart slip on outlets run 15 degrees cooler with Mobil 1 V-Twin than the other oils I tried first. 90 ambiant temp on Foothills Parkway and Dragon, oil tank temp @ 240 with 3 other synthetics and Mobil runs @ 225. I guess that be ok. Normally wouldn't change oils like that but I did and seem ok now with 1-V Twin.

 

Why not just install an oil cooler? Really?

 

stg1 to get A/F ratio down from factory EPA setting.
cams and dyno to help even more.
then syn oils..

With all three of this mods my oil temp went from average of 245 to 215.

Also just getting some miles on her helps too.



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Nah brother, I am spot on. I even took this very statement to our senior engineer this morning. My sizing was just a # thrown out but not far from the truth of an extreme 50-60% glycol on say a Ice rink chilled water loop. Glycol reduces the ability of the solution to transfer heat greatly, it reduces pump efficiency as well as the coil's(radiator) ability to transfer heat. There are many variables to the equation. Put straight water in a vehicle and the cooling system will work better, but it was engineered to have glycol so therefore all of the above.

Next time you call someone out and come off with a jackass statement you may want to have your facts together. You have no freakin Idea what I do for a living and the resources that are at my fingertips.

 

Oil is going to get you 40 different answers from 40 different people. You will have to make your own decision. But here is my observation. I have a 2008 Screaming Eagle Ultra Glide with a 110 C.I. engine. I ran the Harley Syn 3 in it till talking to my favorite Harley Mechanic(about the only one I trust, I have followed him around to 3 different dealerships, if they pull shenanigans, he leaves) and he said I should use AmsOil in the bike. It makes the rear cylinder run 25 degrees cooler. Well I thought "give it a try". I can say this, my bike would go into limp mode sitting at traffic lights in 65 degree weather and Harley would just say "That's Normal" BS. I put Amsoil 20-50 V-Twin oil in and no more limp mode even sitting in traffic or riding in 100 degree weather. All I can say is That Stuff works. I am a believer. Full synthentic for me. I can be sitting at a light or in traffic idling and it is an idle not going into limp mode. Everything else is the same.
That has been my observation.
DJ