6MT Oil - Amsoil vs. Red Line?
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6MT Oil - Amsoil vs. Red Line?
About to change the manual trans. oil and I can't decide between:
1. Amsoil Gear Lube 75W-90 API GL-4 (MTG) ,14.80 per Qt., or
2. Redline MT-85 75W85 GL-4, 14.49 per Qt., or
3. Royal Purple Max Gear 75W90 Synthetic, GL-4 and GL-5, 18.99 per Qt.
I understand from all the posts I could find you want GL-4 (not GL-5). Service manual calls for API GL-4, Viscosity SAE 75W-85 or 75W-90, so all seem to meet this. Anyone have any experience with any of these? Tempted to go with the Amsoil or Royal Purple which are slightly thicker - my trans. gets very noisy when hot and the oil starts getting thin. Thanks.
1. Amsoil Gear Lube 75W-90 API GL-4 (MTG) ,14.80 per Qt., or
2. Redline MT-85 75W85 GL-4, 14.49 per Qt., or
3. Royal Purple Max Gear 75W90 Synthetic, GL-4 and GL-5, 18.99 per Qt.
I understand from all the posts I could find you want GL-4 (not GL-5). Service manual calls for API GL-4, Viscosity SAE 75W-85 or 75W-90, so all seem to meet this. Anyone have any experience with any of these? Tempted to go with the Amsoil or Royal Purple which are slightly thicker - my trans. gets very noisy when hot and the oil starts getting thin. Thanks.
Last edited by JohnPawlak; Mar 23, 2012 at 12:53 AM.
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