SnoMan

"351CJ" wrote:
> DO NOT switch to a non
>synthetic oil, you are driving a ,000+ truck why scrimp on
>dollars
>worth of synthetic oil???
>
>

Wasted money as old dino gear oil (properly graded for use) will do
just fine and I have never lost or wore out a properly sized rear axle
using it. It is a myth that you need syn gear oil for your 35k + truck
to last. The rest of the truck will give up long beter the diff’s do
when you use dino oil in them. I have a 79 J20 jeep that has never had
syn oil in diffs and it has had a HARD life haul, plowing snow and
pulled stock and grain trailers and it diffs are still tight and
quiet. Plus like I said earlier, syn oil get dirty and full of water
just as easily as dino oil and it is a lot more economical and viable
to change the oil for 8 or 10 buck after running in water than 4 or 5x
more because it is these changes that will keep it alive not the use
of syn.

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