Oil change interval with redline?

[dexter]

Curious what you guys are doing for oil change intervals in the 6.4

I switched to redline 5w30 per som recommendations here and the truck runs great. I was just curious if I still need to do every 5k or if it's safe to go longer

Yea, 5W30 redline is not the right oil for your truck 0w40 redline is better. It has more moly.
It gives better protection at start up
It gives better protection at high temps.

 

[Burla]

Roger that! I've used Blackstone in the past when I was heavily involved in the Infiniti world... Those engines were notorious for hitting limp mode at the track... Turned out Motul 300V was the remedy after a few tests with Blackstone. (Has anyone tried 300V on these hemi's? LOVED that oil)

Just ordered a test kit from Blackstone, but realized I will likely have to wait to send in a sample as I don't know what kind of oil the dealer used before buying the truck...

Planning on an oil change and will use Redline 0W-40, then will send to Blackstone at 7,500.

I wish more guys would have ran 300v, I do believe that oil has great potential for killing ticks.

 

[dexter]

Every truck is different, and how they are used is different, I still had 3 tbn after 2 years and 10k mile interval, and one time u&a was near out of tbn in the 4-5k mile range. I think that was an anomaly but I have seen it more then once, I'd generally say 7500 miles is safe, but you should use blackstone to set your interval if you want a 10k mile interval. With freeway miles and uoa you could go as high as 15k miles, but that would be an upper limit.

You live in CA; he lives in NH ... very different.

Redline 5w30 has nearly no shear, and 0w40 srt oil will shear down at least a couple points. I have no doubt 5w30 redline will be thicker then 0w40 PUP in it's interval.

Do you have any numbers for that and is it of any significance?

I'm referring to Redline 5w30 Vs Redline 0w40

 

[dexter]

@Burla

So just to be clear...

We're saying Redline 0W-40 for the 6.4 at 5,000 mile intervals to err on the side of caution?

Living in CO and at 6,400' elevation (with a decent amount of winter months spent above 8,000'), do I need to change my oil weight during winter? Or good to stay with 0W-40?

Thanks!

Going from 0w to 5W for the winter would be going in the wrong direction in the winter.

Do you have a block heater in your truck? If not, that would be a better add for winter then playing with your oil. There are also oil heaters that you place on the oil pan.

 

[dexter]

Ok, so I'm safe with the 5w30 that's currently in it? I live in NH, I don't tow, many of my miles are highway. Should I go with 0w40 or 5w40? This is a 6.4

It's summer! 5w is fine unless you are going to a very hot area. Next oil change go to 0w40 redline.

Do you have a block heater in your truck? If not, that would be a better add for winter then playing with your oil. There are also oil heaters that you place on the oil pan.

 

[Gamedog]

Going from 0w to 5W for the winter would be going in the wrong direction in the winter.

Do you have a block heater in your truck? If not, that would be a better add for winter then playing with your oil. There are also oil heaters that you place on the oil pan.

Roger that.

I do have a block heater. Will stick with 0W.

 

[Burla]

40 weight versus 30 weight in the cold...

The 0 winter rating with 40 weight oil is very misleading. It only means they have done all they can to make that 40 weight flow better when cold, it doesn't mean it will flow better cold then 5w30, in fact it wont, it wont at all. If they had a 0w40 in this chart it would be similar to 5w40 as the 0w30 and 5w30 are close.

0w40 has nothing in common with 0w20 oil for cold viscosity.

 

[KeepRight]

It's summer! 5w is fine unless you are going to a very hot area. Next oil change go to 0w40 redline.

Do you have a block heater in your truck? If not, that would be a better add for winter then playing with your oil. There are also oil heaters that you place on the oil pan.

Most diesel trucks come with the heater plug installed. All that is needed is the plug cable.

Passenger side, Aft/Rear freeze plug, look if there is a prong... If so you have the heater portion already. Just look up the cable, auto parts or Amazon.

My Ecodiesel has the heater core already installed... Bonus!

The picture below isn't perfect...

 

[Burla]

Viscosity charts are just a range, manu's are supposed to take oil viscosity in their considerations. It doesn't mean that 0w40 flows better in the cold then 5w30. It means that a manu believes the operating viscosity is important for their engine function, but there are other considerations as that is only one measure of viscosity.

 

[Thorbeast]

Mine is a gas truck, no block heated in it

How come on that chart 5w40 is so much higher than the others?

 

[Burla]

How come on that chart 5w40 is so much higher than the others?

That's the point I was trying to make, it is 40 weight and the others are 30 weight, 40 weight is thicker on every metric on viscosity chart in the cold and the difference is astronomical. Now, redline 5w30 handles both metrics better, as in hths and noack which are other viscosity measurements hotter then cSt the redline would actually be thicker or thick as a random 0w40, but in the thin range it would outperform 0w40.

look at 0 which is 32F, look at the viscosity! All the 30's are around 500 visc but the 40 weight is around 1,000 visc.

 

[Thorbeast]

That's the point I was trying to make, it is 40 weight and the others are 30 weight, 40 weight is thicker on every metric on viscosity chart in the cold and the difference is astronomical. Now, redline 5w30 handles both metrics better, as in hths and noack which are other viscosity measurements hotter then cSt the redline would actually be thicker or thick as a random 0w40, but in the thin range it would outperform 0w40.

look at 0 which is 32F, look at the viscosity! All the 30's are around 500 visc but the 40 weight is around 1,000 visc.

Ahhh ok that makes perfect sense. So going by that chart, I'm not doing damage with the 5w30 but I should switch back to either 0w40 or 5w40?

 

[Burla]

Not every 5w30 is equal, I consider an individual formula. 5w30 redline is better performing on the hot and cold range, but other 5w30's may not be. So you need to actually look at spec sheets to see. Some 5w30's would not be acceptable at all in the 6.4. Which 5w30?

 

[Thorbeast]

Not every 5w30 is equal, I consider an individual formula. 5w30 redline is better performing on the hot and cold range, but other 5w30's may not be. So you need to actually look at spec sheets to see. Some 5w30's would not be acceptable at all in the 6.4. Which 5w30?

Sorry, I was more asking about the 5w30 redline currently in my 6.4

 

[Burla]

Sorry, I was more asking about the 5w30 redline currently in my 6.4

If I had a 6.4 I would either run 5w40 redline or 5w30 redline. If I still got piston slap on 5w30 in the cold, I would even go to 0w30 redline, that would be as low as I would attempt to go. And I would do a uoa with any strategy. Remember, we are NOT even talking about the difference in 5w20 to 5w30 which is 3, 5w20's are usually 9 cSt, and 5w30 redline is right at 12, so when you look at the most popular 0w40 being 12.9 viscosity at operating temp, you can see it is very similar in weight but the 5w30 redline would be both better in the cold and if the engine worked harder and got hotter as proven with hths and noack. You are good imo.

When you changed oil to 5w30 how did the engine sound?

 

[Thorbeast]

@Burla in my opinion it got quieter and sounded smoother which is why I never gave it a second thought after switching

 

[Burla]

@Burla in my opinion it got quieter and sounded smoother which is why I never gave it a second thought after switching

just backs up what you see on the stat sheet, and we haven't even talked about the additives and base oils. I wouldn't give it another thought either.

Understand there is a huge difference within 5w30's, as you see PP is at 9 range visc, that is two-three points less then redline, so no I would never put that in a 6.4.

 

[Thorbeast]

Ok so the big question @Burla... Do I exchange the 5w30 redline sitting in my garage or continue using it?

 

[Burla]

Dude, 5w30 redline keep using it.

 

[dexter]

Mine is a gas truck, no block heated in it

How come on that chart 5w40 is so much higher than the others?

It can be installed if you think you need it.