Synthetic Oil

[Hemi395]

I've lost a lot of respect for Royal Purple in the last few years. I'd rather run PYB or Pennzoil Conventional gear oil over RP or RP gear oil.

Amsoil Severe Gear or Redline gear oil are the two best gear lubes out there imo.

 

[AFMoulton]

Jeff: Does the 6.4L seem to be happier with a Oil with a higher dose of Moly?
Pardon my ignorance on the 6.4L.
Does yours have the MDS system?

It does have MDS, although I’ve rarely seen it come on LoL

Not sure about the higher moly part just yet, but better protection is always a good thing


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[AFMoulton]

Amsoil has 5w40.

If only it was their SS stuff, I have not had a lot of luck with any of their other stuff


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[Burla]

Here is why Amsoil doesn't have more 40 weights in their own words. They gave up on 10w40. Also reveals why their NOACK is low, They use Vii's that resist thinning with heat, also their own words.

 

[AFMoulton]

Here is why Amsoil doesn't have more 40 weights in their own words. They gave up on 10w40. Also reveals why their NOACK is low, They use Vii's that resist thinning with heat, also their own words.

Well that sounds interesting. I wonder what all is going to happen soon with the heavier weights. I prefer something that protects over Fuel Economy


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[Rampant]

I think a lot of that has to do with the manufacturers. As long as manufacturers keep producing engines and specifying they need more viscous oils, they'll keep making them. Simple supply/demand. When it comes down to it, they all gotta dip their beaks in this game to keep the lights on.

 

[Burla]

There are applications that can't take the 20 weights, so likely they will always have the heavier oils. Most companies still have 5w40, I don't know why Amsoil only has 0w40, maybe they will add another 40 weight later and just got the most important one up and running with the reformulation, dunno. Having said that 0w40 is the best 40 weight oil and should protect really well. Also, you may like this as well, Amsoil went against what super class oils do and their 0w40 flows two full points thicker then the 0w40's that flow in the 12's. At operating temps Amsoil SS flows at 14 plus, so I would just use that then with confidence. Was there a reason why you didn't want 0w40 ss?

 

[U&A]

I’m a few pages behind on reading but just thought I’d share this important piece of information. I’m currently standing in a park-and-ride parking lot in front of my 6.4 hemi that is idling. While peeing in the snow, I realize how insanely quiet my engine is. Like So quiet my Pee is louder than my engine

Thank you Redline.

Carry on

 

[Burla]

That should be their new slogan, so smooth you can hear yourself pee. Well maybe not.

 

[AFMoulton]

Burla, I was just thinking about a heavier weight on the cold side because of the hot ass temps in Vegas. But if the guys I respect and know more about oil than I’ll ever learn say 0W-40 is the best, then that’s what I’ll use.

Of course it’s an ever evolving cycle and things may change


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[Burla]

So Jeff, just go look up a bunch of 40 weights, 0w40, 5w40, and 10w40. Look on the tech sheets for kinetic viscosity @100C, that is what matters to you-operating temps. You value a "thicker" oil because of the heat, and what I am trying to say is Amsoil SS is one. It is likely thick as most other 10w40's at operating temps. For some reason you are conflating winter rating with thickness, that is a mis thought. You can have a zero rating AND a thick ass oil under heat and load.

However, one thing that happened is the high mileage class choose 10w40 for most of their oils. Only due to this "high mileage" designation do 10w40's go even thicker. The 5w40's are really not high mileage class, so look those up. Those tend to be diesel weights, and I bet Amsoil SS 0w40 is as thick as most of those.

 

[U&A]

Can i say that let’s please not promote 0w oil unless it is truly needed.

 

[Drunken Hamster]

Can i say that let’s please not promote 0w oil unless it is truly needed.

Ooh, I want to hear this. Why not, and when exactly would it be needed?

Sent from my magic 5-inch

 

[Burla]

1. Kyle Kyle Kyle, shame. I am shaking my finger at the net book. 0w40 is the exception to the rules.

 

[Burla]

Ooh, I want to hear this. Why not, and when exactly would it be needed?

Not pure base oils, but there is a reason to accept 0w40's. Thin for weight, more additives, built to counteract low additive CAFE standard 20 and 30 weight oils. Think of most 0w40's as kick ass 30 weights.

 

[SyN]

Don’t get too hung up on the W rating!
The second # is the business end!

Too be perfectly honest: My favorite sports car —->(Nissans GTR) recommends a 0W-40 oil in that amazing twin turbo monster for a reason.
Though some owners switch over to a 10W-60 for those long autobahn runs.

Honestly I think if I had settled on a 6.4L instead of my awesome 6.7L CTD:
After the 10K mile mark I would switch to RL 10W-30 w/RP Filter with never a second thought.
Would definitely do 1yr OCI.

Once again Nothing Wrong w/Amsoil SS 0W-40.
I just refuse to pay to be a PC & still have to pay Tax/Shipping on Oil.
Also you can flat out Suck It! If you expect me to spend over $100 to earn that free shipping!

 

[Drunken Hamster]

Not pure base oils, but there is a reason to accept 0w40's. Thin for weight, more additives, built to counteract low additive CAFE standard 20 and 30 weight oils. Think of most 0w40's as kick ass 30 weights.

Now, you guys are always saying RL is thicc, but you're saying 0w40 is thin with a lot of additives and like a kick ass 30wt. So is RL 0w40 still too thicc, or does it follow the rule of all 0w40s?

((currently thinking 10w30 for my next change.))

Sent from my magic 5-inch

 

[Burla]

With modern considerations, as in the way specs are going, redline 40 weights are too thick. Part of modern considerations is having a balance between gas mileage and metal protection. The modern view is as thin as possible. Now you could make a case 5w30 or 10w30 redline is better then the "super class" 0w40's. The thin 40 weights were designated to act like 30 weights with all the modern considerations. Old school was always, thicker is better, times have changed.

 

[U&A]

I know the AWSOME benafits of 0W40. But.... JMO.... VII’s kill it for me. Note that i will still be trying straight 0w40 this coming winter but ONLY because I feel it may be necessary from the cold weather i deal with.

0w40 is a kick ass 30w... yes, but one that is still full of VII’s.

 

[U&A]

1. Kyle Kyle Kyle, shame. I am shaking my finger at the net book. 0w40 is the exception to the rules.

Sorry BBB, there are no exceptions to the triangle rules in my book. JMO.