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Originally Posted by gsxr
Like I've said (repeatedly), the wording on their spec sheets is very odd. The new M-1 MVF is "approved" only for Mercon/Allison/ZF applications, not Dexron. It's "recommended" for Dexron apps, but they then "recommend" their synthetic blend Dexron VI formula for "improved performance" on pre-2006 GM vehicles! Why would a synthetic blend out-perform a full synthetic, and only for Dexron applications? Sounds fishy to me. Their Dexron VI formula is "approved" for Dexron applications. It's like they're saying "yeah, you can use M-1 MVF in Dexron transmissions, but we'd rather you didn't... instead, you should use our synthetic blend fluid." Oh, and also, the new MVF stuff is about 20% cheaper than the previous M-1 formula it replaces. That's also a little odd.
True. But there may be disadvantages to the new stuff that we're not yet aware of. I'd prefer not to find out the hard way!
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The "improved performance" may be slightly better fuel economy and I doubt it has anything to do with wear, but of course I could be wrong. Like I said today's transmissions call for thinner fluids. If you go to Redline's website and look at their transmission fluid spec sheet, you'll see that the new D6 has a lower viscosity than the older formulas. If you do get a hold of a Mobil tech let us know what he says about this. I'm curious too. More likely though you'll get a hold of some clueless customer service representative.
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2004 VW Jetta TDI (manual)
Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL
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