They should tell everyone before you buy a wrx sti to expect big bills every week . 

Does anyone know what the best gear oil and brand to put in the wrx sti Hawkeye gearbox 6 speed to quieten it down . Sick of the whining especially if going down a hill in gear or low gears . It prob needs looking at but will have to wait till summer . Garage before me I think put 75/90 don’t know what brand. Been gradually getting worse . 

75w/90 gives consistency over the biggest temperature range of the recommended types, not sure its going to stop the whine though

Ok no prob I’ll wait till it gets worse then  I’ll put a louder exhaust on lol