Synthetic Oil

Oil of Choice

  • Castrol Syntec/Edge

    Votes: 233 8.4%
  • Royal Purple

    Votes: 325 11.7%
  • AMSOil

    Votes: 396 14.3%
  • Valvoline Synpower

    Votes: 160 5.8%
  • Mobil 1

    Votes: 992 35.9%
  • Other

    Votes: 660 23.9%

  • Total voters
    2,766

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Ramnewbie

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I can't remember if the 3.9 in the Dakota had any kind of vvt or not, or the 5.4 in my old f150, but all the others have had some sort of vvt. I don't know if that has something to do with it or not.

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Hemi395

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I just thought that was normal, my old f150, the journey, my wife's last 2 grand caravans, my old Dakota, basically everything I've had that's had a tach in it has idled at 700/750.

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That's cool maybe they realized 550 is too low. Yeah mine was always around 550 until I got my tuner and bumped the idle up to 650...
 

misuracaf10

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I was just thinking all these brick and mortar stores saying they can't compete with Amazon or other mail order/ internet is a bunch of crap. They just aren't interested in keeping up with newer products. We've got a ton of STP, Lucas, hyperlube, and various other chemicals on the shelf that basically don't move at all. We used to have water wetter on the shelf, couldn't keep it on the shelf, sold it almost as soon as it came in, but now we don't stock it anymore. We can get it, but it's not on the shelf. Lubeguard, we have the transmission additive and LSD additive but not the engine additive. For the most part of you want the good stuff you have to order it from somewhere.

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Great point. Half the stuff I want I can’t find at an oreillys/autozone


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Ramnewbie

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Great point. Half the stuff I want I can’t find at an oreillys/autozone


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I work at an auto parts store and I order all my oil and fuel treatment. Which makes it kind of hard when a customer asks me what I would recommend, can't say none of this stuff.

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HammerHead

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Got this off the Q&A section, thought it was interesting. Note: This was copied and pasted.............................




Typical Examples of Actual Motor Oil thickness (But, any individual oil’s specific thickness may vary somewhat)

cSt @ cold 40*C (104*F) / cSt @ hot 100*C (212*F)

0W20 = 44.9 / 8.5, or 5.3 times thicker when cold
0W30 = 53.8 / 9.6, or 5.6 times thicker when cold
0W40 = 79.9 / 14.3, or 5.6 times thicker when cold
—–
5W20 = 51.6 / 9.0, or 5.7 times thicker when cold
5W30 = 62.4 / 10.8, or 5.8 times thicker when cold
5W40 = 87.2 / 14.7, or 5.9 times thicker when cold
—–
10W30 = 71.8 / 11.5, or 6.2 times thicker when cold
10W40 = 96.5 / 14.7, or 6.6 times thicker when cold
10W60 = 168.5 / 24.1, or 7.0 times thicker when cold
—–
15W40 = 105.0 / 14.8, or 7.1 times thicker when cold
15W50 = 133.8 / 20.2, or 6.6 times thicker when cold
—–
20W50 = 170.0 / 20.2, or 8.4 times thicker when cold

Looking at 0W20 and 5W20, notice how the thickness of the cold viscosity rating (the number BEFORE the W), also affects the thickness of the hot viscosity rating (the number AFTER the W). The hot thickness of 0W20 is 8.5 cSt, while the hot thickness of 5W20 is 9.0 cSt. So, hot 0W20 is about 5.5% thinner than hot 5W20, which would result in somewhat of an oil pressure drop.
 

Burla

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Went for a longish trip today, 1/2 hr both ways anyway. Oil temps didn't hit 200, with 10w30 redline. Coolant was well over 200, trans temp didn't hit 135 factory atf.
 

Hemi395

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Gotta love these RFE trans running cool like that. There have been many times in the winter here where my 6 speed never broke 100*
 

Burla

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I think the weakness of the 6 speeds is the shift points, and that is why everyone likes the 8 speed, however the 8 speed has the increased temperature. Too bad they don't preheat the 8 speeds oil, I'm sure people would like them even more. I don't know how many people who choose to preheat oil in anything, over not mechanically heating it. That would make me very nervous some of the temps the guys have with these 8 speeds.
 

U&A

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I agree Mike

The shift points of 65,66,68 are crap. The Cummins just masks the issues better with the higher torque. The 6.4 with the 66RFE needs to be run kinda hard and at higher RPM’s and then it shifts much better. The 65RFE is like that as well.

Bottom Line

If you grandma drive them they get confused/drive mushy.

JMO




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Last edited:

69GWC

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Along with the shift points and how lazy the 6sp shift they are way over geared.
I drove my Cummins for close to 60k and hated that transmission, it was better after I had it tuned but still got me to where I would never buy a truck with that trans again.
I wanted a 2500 and a Ram but went to the 1500 so I could have a good transmission, if there was not the 8sp option I would have been looking at F250s.
My 2002 Chevy HD had a way over geared trans and always upshifted to soon and after 75k I sold it because of that ****** transmission.
 

R.L.K.

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I also ran 5w30 RL before this run of oil I never saw over 221*
I experienced a bit warmer oil temps on my RL10W-30 as opposed to the RL 5W-30 as well [emoji1303]

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U&A

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If I remember correctly there was some butthead that said the 5W oils are Redline’s best in his opinion....
For the life of me i cant remember who?


;)

LOL


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SyN

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Gotta love these RFE trans running cool like that. There have been many times in the winter here where my 6 speed never broke 100*

Nothing but a question: Is this actually creating the proper flow characteristics for ideal lubrication within these transmissions?

Guess it all depends on the actual viscosity of the ATF to help with better flow when cold.

This is something I have thought about for a while:
I know that within motor oils some additives have to reach a certain operating temp before they become fully active in performing properly (In the job they were intended to do).
I am curious if this is correct in ATF as well.

I guess what I’m asking & more curious about is: with ATF is running to Cold an actual good thing especially during the winter months?
Does the oil actually get to the proper temp to lubricate the transmission the way it was intended to be lubricated?

Once again: Just me thinking out loud!
 
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Hemi395

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Nothing but a question: Is this actually creating the proper flow characteristics or ideal lubrication within these transmissions?

Guess it all depends on the actual viscosity of the ATF to help with better flow when cold.

This is something I have thought about for a while:
I know that within motor oils some additives have to reach a certain operating temp before they come fully active and performing properly In the job they were intended to do.
I am curious about ATF as well.
Never thought about that you could be onto something there....
 

Burla

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makes you wonder if d6 is better then c+ for cold states plus 6 speed due to it's thinner starting visc. Maybe Dave from redline could address that. also makes you wonder if c+ is better then d6 for the zf since it always seams to run hot. oh here we go....
 

Burla

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Thanks Syn for opening the Can.

Look back at what Sean did with ecodiesel 8 speed. Went to a lower oci and valvoline max atf which clearly isn't zf fluid. didnt he also use amsoil which I also believe not zf compatible?
 

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