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Old 08-27-2003, 07:32 AM   #8
DrD
Scooby Guru
 
Member#: 22412
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2012 Legacy 2.5GT
Ice Silver Metallic

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Quote:
Originally posted by badkid
MT-90 is a 75W90 gear oil and is of the proper and recommended viscosity. It's GL-4 and thus is not as slick as the GL-5 75W90 oil.
GL-4/GL-5 has more to do with the ability of the lubricant to handle high pressures and shear loads without falling apart. The GL-5 has more extreme pressure additives.
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