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-   -   Which Oil? (http://www.jeepgarage.org/f5/which-oil-21606.html)

djcodered 04-10-2011 10:07 PM

Which Oil?
 
I have a 2005 4.7L V8 Wk. I just purchased it and am enjoying the information I am receiving from this forum. Today we replaced the sparkplugs, air filter, and pcv valve. We were about to do the oil as well however I am finding mixed information about which oil to use.

Using this link, which I find to be "bible" like; http://www.wkjeeps.com/wk_maintenance.htm#ENGOIL it clearly says to use 5W 20 oil. I have also read from a couple threads to use 5W 20 also.

However a couple of threads say to use 5W 30, as well as my oil cap says 5W 30.

I am confused, have no way of knowing what oil has been run in it previously, and need advice.

Thank you.

White Chocolate 04-10-2011 10:09 PM

Re: Which Gas?
 
either will work.

djcodered 04-10-2011 10:18 PM

Re: Which Oil?
 
okay either will work? I bought M1 5W 20. What is the difference?

dmsfun 04-11-2011 09:02 AM

Re: Which Oil?
 
I do not know what the 4.7 specifies, but it is important to use whatever oil weight the owners manual says to use for the vehicle. It says 5-30 on the oil cap, but I would verify in the manual just in case that is not the original cap.

djcodered 04-11-2011 09:08 AM

Re: Which Oil?
 
Thanks guys. There are just so many threads on here regarding this, and it seems everyone has a different opinion. If the 20 vs 30 is merely a MPG difference and won't do any harm...I would choose to save gas since I am not ready to take it off road yet..Got a few more things to do. I did of course buy Mobil 1 5W20 after reading the WK Jeeps page, but I do have Castrol High Mileage 5W30 as well. Maybe I should mix them? Lol!:rolleyes:

Good idea about it being a different gas cap.:thumbsup:

Chaoul1 04-11-2011 09:32 AM

Re: Which Oil?
 
Mobile 1 or Amsoil :thumbsup: and use 5W30

JeepCoop 04-11-2011 09:38 AM

Quote:

Originally Posted by Chaoul1 (Post 393738)
Mobile 1 or Amsoil :thumbsup: and use 5W30

X2 on the Mob UNO. Best shite for my Hemi. I'd highly advise against Royal Purple too, that sh!t be no good

sweetjeep99 04-11-2011 10:16 AM

Re: Which Oil?
 
I beleive it's
5w 20 for the 5.7
5w 30 for the 4.7

Kman09JGC 04-12-2011 10:27 AM

Re: Which Oil?
 
My 09 4.7 calls for 5W-20 and used RP last two oils changes and runs great. I dont know if its different for 05-07 4.7

robpp 04-12-2011 02:42 PM

Re: Which Oil?
 
on the 4.7 in 2007 to help with gas mileage they changed the requirement to 5-20 FROM 5-30.

on the hemi, sometime in 05/06 they changed it to 5/20 for the MDS/

lewi3069 04-13-2011 01:11 PM

Re: Which Oil?
 
Quote:

Originally Posted by robpp (Post 394553)
on the 4.7 in 2007 to help with gas mileage they changed the requirement to 5-20 FROM 5-30.

on the hemi, sometime in 05/06 they changed it to 5/20 for the MDS/

Finally an answer for why I have 5w-20 in my 4.7 lol... Thanks man.

Anyways I recommended Amsoil. Talk to our dealer on here he can prob get you a deal.. I run it in everything but the trans... Love it...


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