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Old 04-15-2008, 12:35 PM   #24
Scooby Specialist
Member#: 41070
Join Date: Aug 2003
Location: Arizona
2005 Black Tiger
(Black Turbo Baja)


Originally Posted by prometheum View Post
i'm not sure you should run severe gear in your transmission, its a hypoid gear oil which contains extreme pressure additives which are really bad for yellow metals like your synchros
This is really, really, really out of date 'info.' Modern, reasonable-quality GL-5 gear oils all have plenty of metal deactivators to make this a complete non-issue. Besides which, the 5MT in a Subaru contains a hypoid differential which really needs a hypoid gear oil for proper protection.
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