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Originally Posted by KWolf
I'm kind of new to the forum with a 2005 @ 15k and was scoping out service info.
Has anyone tried synthetic diff oil or should I stick with the stock stuff?
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either, or what ever you want to use, just make sure it meets or exceeds gl-5 spects and is the proper wt range (80w-90, 85w-90) and is for limited slip use in the rear (some say "for top off of limited slip diffs) read the bottle carefully
synth i think are 75w-90, i think you should be ok with any of the above
just document the change miles and date and recept and amount you put in the rear as per kia spects and raised the rear of the vehicle 8 inches to fill should any warrenty questions arise