Valvoline Maxlife is a DEXRON III/MERCON product...it's good stuff, I use it in my truck that specifies DEXRON II. (note that there is no "T" in DEXRON...)
On the Valvoline website, it says "Recommended for use where.....Toyota T-IV..." and in the FAQs it says" Does MaxLife ATF meet the spec for Volvos with a Geartronic Transmission?
Valvoline MaxLife Dex/Merc ATF will meet Volvo specifications that require the use of TIV or JWS3309 ATF."
I am not a fan of using Maxlife, doctored with Lubegard Red or not (nothing wrong with lubegard either...), in this transmission...but since Valvoline says it will work, I wouldn't run out and flush it either. Note that a claim to be appropriate is not the same as a certification that fluid meets specifications.
The question, for your shop, is why use Maxlife, when the specified product (Mobil 3309 or Toyota T-IV or even the Motorcraft) is the same price? Do they get Maxlife in bulk? Too lazy to go out and buy it?
Current Fleet:
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (130K, Michelin AS4, HPL 0W40)
2005 MB SL600 (58K Michelin AS4, Mobil 1 0W40)
2004 V70R (147K, six speed M66, HPL 5W40)
2004 XC90 (247K, HPL 0W30 Euro)
2002 V70-XC (300K, HPL 0W30 Euro)
2002 V70-T5 (230K, IPD bars, Bilsteins)
2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)
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