Automatic Transmission Oil Fits 45 vehicles
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Dexron III (ATF)
~9.0-9.5 L (dry fill)
4-speed 4L60-E automatic
Castrol Transmax Dexron III / Penrite Dex III
Consistent with the 4L60-family automatic carried over from VR/VS.
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Automatic Transmission Oil Fits 59 vehicles
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Dexron III (ATF)
~9.0-9.5 L (dry fill)
4-speed 4L60 automatic (V8 Group A used ZF automatic in some variants)
Castrol Transmax Dexron III / Penrite Dex III
Dexron III is the standard recommendation for GM 4L60-family automatics of this era.
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Differential Oil Fits 67 vehicles
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SAE 80W-90 GL-5
~1.2-1.4 L
Independent rear suspension (IRS) diff, open or optional limited-slip.
Penrite Pro Gear 85W-90 GL-5 (+ LSD friction modifier if fitted)
Capacity is a typical estimate, broadly consistent with VN-VS.
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Differential Oil Fits 67 vehicles
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SAE 80W-90 GL-5
~1.2-1.4 L
Independent rear suspension (IRS) diff, smaller than the earlier live-axle Salisbury unit open or optional limited-slip.
Penrite Pro Gear 85W-90 GL-5 (+ LSD friction modifier if fitted)
As per VN/VP.
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Engine Oil (V6: 3.8L Ecotec L36) Fits 37 vehicles
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SAE 10W-30
5.3 L
3.8L Ecotec-generation pushrod V6
Castrol GTX 10W-30 / Penrite Everyday 10W-40
5.3L figure sourced from a CarsGuide Q&A on a 1998-era V6 Commodore. Holden\'s factory handbook spec for this era was 10W-30 do not use 20W-50, which is too heavy for this engine\'s oil-pump clearances. VZ also introduced the Alloytec 3.6L V6 late in its run alongside the outgoing Ecotec 3.8L — see VE/VF entry for Alloytec-specific figures if fitted.
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