RP vs valveline - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 10 (permalink) Old 02-11-2009, 07:51 PM Thread Starter
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RP vs valveline

I ran rp 15w40 for about 70k and switched to valveline prem. blue xtreme 5w40 about 3k miles ago. I tested the rp right before I changed oil. both tests were run right around 3k miles. this was also the first 3k miles that I ran the valveline. this is not a long term test. I will also put up the futher tests that I get done. I have a bunch of fuel in both tests. What could be the cause of this?


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post #2 of 10 (permalink) Old 02-11-2009, 07:52 PM
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Re: RP vs valveline

You could have one or more injectors failing.

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post #3 of 10 (permalink) Old 02-12-2009, 10:36 AM Thread Starter
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Re: RP vs valveline

wouldn't I notice that in the performance of the truck? The truck runs fine.

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post #4 of 10 (permalink) Old 02-12-2009, 12:51 PM
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Re: RP vs valveline

It depends. I thought mine ran fine until I replaced 2 of the failing injectors. Then I realized it was running like crap before. The only link between fuel and oil is the injectors.

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post #5 of 10 (permalink) Old 02-12-2009, 10:21 PM Thread Starter
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Re: RP vs valveline

so how did you figure out that your injectors were bad?

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post #6 of 10 (permalink) Old 02-14-2009, 02:15 PM
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Re: RP vs valveline

Quote:
Originally Posted by PSDnate View Post
I ran rp 15w40 for about 70k and switched to valveline prem. blue xtreme 5w40 about 3k miles ago. I tested the rp right before I changed oil. both tests were run right around 3k miles. this was also the first 3k miles that I ran the valveline. this is not a long term test. I will also put up the futher tests that I get done. I have a bunch of fuel in both tests. What could be the cause of this?


Attachment 4702

Attachment 4703
Nate, on your first UOA Blackstone failed to inform you that your viscosity dropped down to the lower 1/3 range of a 30 weight oil. A 40 weight oil should fall between 12.5 - 16.29 cSt Viscosity @ 100C (in the properties section of your UOA report). Your viscosity is at 10.8 - a 30 weight oil ranges from 9.3-12.49 cSt Viscosity @ 100C. The 6.0's shear oil quicker than the 7.3L's.

Your second UOA running Valvoline shows the viscosity dropping even lower. The fuel level is increasing and could be part of the reason for the viscosity drop.

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post #7 of 10 (permalink) Old 02-14-2009, 02:30 PM Thread Starter
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Re: RP vs valveline

thanks for the info buffalo. I think I need to take it some where to get this fuel problem takin care of.

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post #8 of 10 (permalink) Old 02-15-2009, 01:45 AM
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Re: RP vs valveline

Wear metals (Iron, Copper, Lead, Alum, Chromium) look great Nate - a great example/comparison showing how overpriced Royal Purple is. Even though it has some Molybdenum in it, RP doesn't use as much as Delo 400 and less than 1/2 that Schaeffer's uses and charges alot more for their product.

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post #9 of 10 (permalink) Old 02-23-2009, 05:10 PM
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Re: RP vs valveline

Quote:
Originally Posted by White Buffalo View Post
Nate, on your first UOA Blackstone failed to inform you that your viscosity dropped down to the lower 1/3 range of a 30 weight oil. A 40 weight oil should fall between 12.5 - 16.29 cSt Viscosity @ 100C (in the properties section of your UOA report). Your viscosity is at 10.8 - a 30 weight oil ranges from 9.3-12.49 cSt Viscosity @ 100C. The 6.0's shear oil quicker than the 7.3L's.

Your second UOA running Valvoline shows the viscosity dropping even lower. The fuel level is increasing and could be part of the reason for the viscosity drop.
I immediately picked that up as well and was going to say something till I saw your post. What I find particularly disturbing is that Blackstone suggests it is ok to run this oil longer. What are they thinking? I'd like to see another run with the valvoline after you get the injector problem straightened out. It certainly looks like there is a problem there.

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post #10 of 10 (permalink) Old 02-23-2009, 11:08 PM Thread Starter
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Re: RP vs valveline

the trucks in the shop this week. when I get it back I'll change the oil and test it after another 3k.

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