Ford MotorCraft MTX oil - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 2 (permalink) Old 01-08-2019, 03:12 PM Thread Starter
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Ford MotorCraft MTX oil

I got the MTX serviced at 60k miles last week, and I used the fluid,Ford Genuine Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid, which is pretty good and removed the notchiness in the first gear.

However, I'm a little concerned about the fluid is slightly out of the spec, the specs for this particular fluid is 75w-90 gl-4 whereas the OEM spec is 75w-80 gl-4.. so my question is it okay for the MTX for like next 40k miles?



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post #2 of 2 (permalink) Old 01-08-2019, 03:23 PM
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I am by no means an oil expert but i'm fairly certain that 75-90 should just be slightly thicker than 75-80 that being the only difference I wouldn't think it could hurt a manual transmission if anything it might be slightly better if you live in a warmer climate.

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