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Considering a Switch to Synthetic Oils

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Like the topic says, I've been considering switching over to synthetic oils and I am considering doing so in the motor, trans, and diff. I've been doing some research on the site here and it seems to be a good choice... However, I'm still trying to see how much of a benefit it would be for me and my application. I'm also concerned about developing leaks.


I have a 1992 (that splits time as a DD) with a 4.0L that has 126,000 miles on it. AX-15 5 spd. and Dana 35 with Trak-Lok. I change all the oils on a regular servive interval and try to use quality oils and filters. I've been using Castrol GTX 10W-30 and a Wix filter in the motor.


I've heard that it may help to use a synthetic blend and then go to a full syn to help avoid leaks... Any truth here?

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