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I put the redline synthetic lightweight shockproof gear oil in the dif of the ranger and must say it works great , picked up an easy 10 lbs torque in the cold weather here now, much better, is a blue color and has some moly in it, flows like 30 weight oil versus the 90 weight and protects even better, at almost 400 k miles she's well broken in and now this week with a bit of warmer weather 40's she is flying, easy to notice a change in an 88 hp truck . all testing seat of the pants but early indication of at least 1/2 mpg gain and driving faster now because it seems to move along easier,
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