Switched to synthetic in the rear end - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-21-2005
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Switched to synthetic in the rear end

Sucked the dino **** out of the 125k mile rear end. I was averaging about 22 mpg.

Refilled it with Alisyn Pro Gear Type 3 (their thickest gear oil, has a consistency close to water).

Driving to and from work, same roads as before, same gas stations, same kind of driving, with driver window down I averaged just about 26mpg.

I am impressed.

Those with old gear oil, switch to synthetic.
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Old 08-21-2005
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how does changing the rear end oil give ya 3mpg?
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Old 08-21-2005
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less resistance from the rear end?
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Old 08-21-2005
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26!!!!!! your so lucky!!
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Old 08-21-2005
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if you did your math right** that is pretty good.

that oil musta been crap...
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Old 08-21-2005
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My old oil was thick, could probably pass off for a solid.
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Old 08-21-2005
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haha, in 1992 you may have had dino oil, in which case it should be changed pretty often. all of the newer trucks come with synthetic oil that has a 100k mile drain interval, so this may not be an issue for a lot of newer vehicles. then again, i do have free tax and shipping on AMSOIL synthetic gear oil
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Old 08-21-2005
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Hey thats the good thing about these 4bangers they get good gas mileage!
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