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  #1  
Old 05-25-2011, 12:25 PM
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Royal purple questions

I have a 06 4.7 G.C.
My question is i'm thinking about switching over to R.P
5/30. so what is the best oil filter i can use with it (or)
should i use the R.P oil filter?
Question #2 I'm also thinking about switching my front &
rear axle oil to R.P to 75/140 So do i still need to put the
additive in it (or) is it already in the R.P?
Any info would be much app.
Thank guys
JOE
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  #2  
Old 05-25-2011, 12:59 PM
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Re: Royal purple questions

If you have the 4.7 then that comes with LSD and the additive is recommended however RP comes with additive

And RP is good but you don't have a performance car so any regular synthetic would do also on oil filters there is a member here who posted in depth analysis of oil filters I forgot the thread but you might search it and see if you can find

I use K&N filters because I like how they are and easy to take off
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  #3  
Old 05-25-2011, 01:14 PM
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Re: Royal purple questions

RP doesn't play nice with MDS...if you have it equipped.
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Old 05-25-2011, 02:23 PM
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Re: Royal purple questions

RP HATES MDS... that said, get a Mopar, Mobil 1 or K/N filter, those are the top choices.

Royal Purple might come with an additive but I have a poor analogy to this: Would you spend the money for both shampoo and conditioner or settle for the 2 in 1 bottle?
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Old 05-25-2011, 02:27 PM
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My Jeep HATED royal purple. I'd suggest what everyone else says. I use mobile 1 w a k&n oil filter n couldn't be happier! Gl
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Old 05-25-2011, 02:32 PM
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Re: Royal purple questions

RP is perfect if you don't have MDS. There is a thread in this already.
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Old 05-25-2011, 02:34 PM
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Re: Royal purple questions

I've heard a lot about WK owners not liking RP engine oil. For the diffs, I'd say go for it. Be prepared to pay almost $20 a bottle though. Additive is not needed if you're using RPO gear oil.

I like K&N oil filters for the same reason as DJ B...no more stupid strap wrench or oil filter wrench. They have a nut welded to the top so you can put a regular old' 1" wrench on it.
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Old 05-25-2011, 04:42 PM
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Re: Royal purple questions

My $.02 is Amsoil for everything engine/diffs. If you have LSD add the additive that they sell.
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Old 05-25-2011, 08:46 PM
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Re: Royal purple questions

Quote:
Originally Posted by lll2for3lll View Post
RP doesn't play nice with MDS...if you have it equipped.
What is MDS?
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Old 05-25-2011, 09:19 PM
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Re: Royal purple questions

Multi-Displacement System http://www.jeep.com/mds/
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Old 05-26-2011, 12:24 AM
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Re: Royal purple questions

I use RP 5w-20 on my 09 4.7 with a K&n filter and it works great
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Old 05-26-2011, 12:33 AM
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Re: Royal purple questions

I'm a fan of the mobile1 for my oil...I do see a diff with MDS. For my diffs, I've been using RP with the mopar limited slip, even though RP is said not to need it. I've been happy running that combo with improved experience.
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