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Vauxhall / GM Gearbox, Diff & Axle Oil Specifications

Gear oil and automatic transmission fluids meeting the various GM gear oil and ATF specifications are listed below under their respective standard numbers. DEXRON® is GM's main ATF standard; oil manufacturers buy a licence to produce oil to the DEXRON®- specification from GM. DEXRON®-VI is the current and only official standard; earlier DEXRON® standards are no longer licensed by GM and therefore not regulated by them in any way.

Opie Oils sells oils manufactured to the GM ATF and gear oil specifications; Opie Oils is not a licensed GM dealer or repair centre.
 

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