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When to change to synthetic oil

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Old 06-05-2009, 09:39 AM
  #11  
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1st oil change 3000 miles - Mobil1 then every 6000 miles - Mobil1. 15,000 miles on my JK now no issues. I also purchased the Lifetime Bumper to Bumper option.

Last edited by dsktopflyr; 06-05-2009 at 09:42 AM.
Old 06-05-2009, 10:14 AM
  #12  
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I changed to Mobil 1 in my JK at 2,000 miles, then changed every 10,000. Have done this on my last 2 vehicles, my Liberty currently has 125,000 with no engine problems, my old cherokee had 214,000 when I sold it - still running great.
Synthetic oil is so good these days, I don't even consider anything else.
Old 06-05-2009, 12:34 PM
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Originally Posted by pearl-drum-man
Not to be a cynic, but I can't wait to see how well the lifetime warranty works when people start testing it with big stuff (engines and trannies).
Tranny was replaced under warranty at 3400 miles.
Old 06-05-2009, 12:37 PM
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As for longevity I also own a 1979 CJ-5 w/212000 miles. Runs great, 10w30 whatever's on sale, changed every 3000. Valve train ticking like a time bomb ever since new.
Old 06-05-2009, 01:56 PM
  #15  
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Originally Posted by rmdchewie
Tranny was replaced under warranty at 3400 miles.

I'm referring more to those that get out 5+ years and 80-100K+ miles and really test the "lifetime" nature of the warranty.
Old 06-06-2009, 01:30 AM
  #16  
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Originally Posted by rmdchewie
So let me see if I am understanding you correctly. You want to pay more for every oil change to make your engine last longer that is covered for life under warranty......Just checking.
The "lifetime" doesn't cover worn out bearings, worn rings, ...... synthetic oil prevents wear, kind of like a longevity warranty!

Last edited by jonc; 06-06-2009 at 01:33 AM.
Old 06-06-2009, 04:40 AM
  #17  
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I will be hitting 10K next week and switching to Mobil 1 5w-20 and a motorcraft FL-400S filter, I'm hoping to have the Jeep for a long time
Old 06-06-2009, 07:38 AM
  #18  
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Originally Posted by RextheJeep
Ok, did the search and no luck so I will ask the question here. My wifes 2009 Sahara needs its first oil change and I want to use a synthetic oil. Should I wait till the engine is broken in? if so when is the engine broken in ? 12,000 20,000 10,000 miles?
Changed the oil at 200 miles and went right to Mobil 1. Has 27K on it now and runs awesome
Old 06-06-2009, 11:09 AM
  #19  
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Originally Posted by jonc
The "lifetime" doesn't cover worn out bearings, worn rings, ...... synthetic oil prevents wear, kind of like a longevity warranty!
I don't know what warranty you have but mine does.
Old 06-06-2009, 02:32 PM
  #20  
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right now!!!


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