Mazda 5 MTX - AMSOIL GL-4 MTF vs. GL-5 gear lube

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Originally Posted By: Number_35
So far, so good, two months into a mild winter. Shifting remains excellent w/ the Redline in the '09 Mazda 5. Will try to drive the car when if/when the weather gets cold. I don't think we've even hit -30 C so far.
We've just passed through a really cold stretch, with the temperature exceeding -30 C consistently. The Redline has continued to provide excellent shift performance. I think it will my new go-to fluid for any future manual tranny.
 
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