5W-30 anyone?
09-16-2011, 04:40 PM
#51
JK Enthusiast
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We were discussing this oil viscosity issue a while back at the local dealer, where they have a pretty decent service floor. I had the service manager and a mechanic I trust tell me only days before a Mopar replacement engine came in with a tag to use 10W30, even though the original engine came from the factory with 5W20.
Despite what Chrysler might say, they told me they had no problem with anyone running 10W30 in the 3.8.
Despite what Chrysler might say, they told me they had no problem with anyone running 10W30 in the 3.8.
09-16-2011, 04:48 PM
#52
JK Newbie
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I started running 5w30 in my 2007 and it seemed to slow the oil consumption a little. I nearly always used Pennzoil regular. Couldn't see paying for synthetic since the Jeep would eat 1 quart every 1K miles.
The new Pentastar indicates 5w30 on the filler. It seems always easier to find the 5w30 too.
The new Pentastar indicates 5w30 on the filler. It seems always easier to find the 5w30 too.
10-02-2011, 04:21 PM
#53
JK Newbie
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I just put 5w-30 in my 2011 because I was hearing knocking today at 13,500 miles. I hope it helps but should I have gone with 10w-30? Would I see a lot of difference between the 5w or 10w?
10-02-2011, 04:51 PM
#54
JK Super Freak
Where I am (hot climate, rarely freezing temps) the Chrsyer dealers use 10w30 and many owners in the really hot outback areas use 10w40 or 15w40.
10-02-2011, 04:56 PM
#55
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The higher the "w" number, the thicker the oil is when cold, so 5w30 will be exactly as thick as 10w30 at operating temps, but thinner at lower/freezing temps. The 10w30 will tend to make the motor run quieter though. If you operate your Jeep in freezing or near-freezing temperatures then stick with the 5w20 or 5w30 as it will lubricate the motor better at cold start-up (where most engine wear occurs); if you live in a warmer climate then the 10w30 will be fine.
Where I am (hot climate, rarely freezing temps) the Chrsyer dealers use 10w30 and many owners in the really hot outback areas use 10w40 or 15w40.
Where I am (hot climate, rarely freezing temps) the Chrsyer dealers use 10w30 and many owners in the really hot outback areas use 10w40 or 15w40.
10-03-2011, 11:47 AM
#56
JK Super Freak
I'm glad to hear of people running other viscosities with success! Not just 5w30, but 10w30 too.
I've been swapping back and forth between 5w20 and 5w30 during the last 10 months. I can tell a difference between the '20 and '30 weights right away. The '30 does drag mileage down a LITTLE, but I'm a light pedal hypermiler guy. The downside, I do get more oil consumption with '20 weight.
I've been swapping back and forth between 5w20 and 5w30 during the last 10 months. I can tell a difference between the '20 and '30 weights right away. The '30 does drag mileage down a LITTLE, but I'm a light pedal hypermiler guy. The downside, I do get more oil consumption with '20 weight.
10-03-2011, 04:34 PM
#59
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I just finished my first day with 5w-30 and it's amazing the difference a small change in oil weights can make. There is still a little knocking but nowhere near what it was. I will probably go with 10w-30 next change and see how that measures up.
10-03-2011, 04:50 PM
#60
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I just switched to 5w30! it seems to have quieted down the engine noise. i have also notice the engine seems to rev smoother through out the entire rpm range! just my 