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Synthetic Oil

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Old 09-08-2007, 07:10 PM
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Default Synthetic Oil

Does anyone use Synthetic Oil in there JK? If so, at what mileage did you start using it?
Old 09-08-2007, 08:16 PM
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You can start the day you buy your Jeep.
Old 09-08-2007, 09:03 PM
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I started around 8k miles. I swapped the diff and trans fluid around 6k or so. Overall I picked up around 1.5 to 2.0 mpg switching to synthetic on all my fluids.
Old 09-09-2007, 04:15 AM
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I do all my own oil changes and since my TL also uses 5W-20 and I use Castrol Synth I decided that makes more sense to just buy a few containers of the same stuff and keep them handy.
I changed the oil on the Rubi at 3500 miles, one thing to think about is that the TL takes 4.5 Qts and the Rubi 6 qts. if I time it right I will end up with an extra Qt so I wont have to buy a separate QT which if you check the prices, is cheaper to buy in 5 Qt jugs than buying individual Qts..... BTW get the ST filters as Wally mart has them for $2......
Old 09-09-2007, 08:59 AM
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Do yo know what the dealer says about using Syn. Fluids in your system? Does it void warranties?
Old 09-09-2007, 02:18 PM
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Mobil 1 at 1,870 miles...
Old 09-09-2007, 02:27 PM
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https://www.jk-forum.com/forums/show...ight=synthetic
Old 09-09-2007, 03:09 PM
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Very interesting...............
Old 09-27-2007, 10:21 AM
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I just don't want the hassle of changing the oil every 3k or so. What do you have to do when you switch to synth?
Old 09-27-2007, 10:45 AM
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Mobil 1 at 1,100 (meant to do it at 1K). Did it myself, no drips, no problems.


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