A mate has got fed up with his poor gearbox performance.

He was recommended Silkolene SYN5, on trying to purchase said oil he was recommended Redline 75W90 NS as being superior. He has now 'fitted this' to the vehicle (hoping insurance isn't now invalidated due to fitment of after market products ) After 50 miles no effect is noted.

Subaru in Holland have recomended quote 'a very special Subaru oil' with a part number that I don't have to hand!

Anyone tried any of these? Any of them give a noticeable improvement ?

Cheers

Mick

 

I stand over Castrol Syntrax. Ive used it in a few Subaru boxes, and a toyota supra turbo box, and have to say it is excellent.

 

ustole is right. Castrol Syntrax. I tried full synthetic and the syncro performance was WORSE especially 4th to 5th at high revs Syntrax cured this completely. (Maybe the full synthetic was TOO slippery!)
JohnD

 

Castrol Syntrax is what Subaru recommend, I think someone from Subaru is getting around... because they recommend Castrol though out the car.

The gearbox has a hypoid gear (what Holland is talking about), and most oil manufacturers don't make oil for this, and if they do they mention it on the container, this could be a big part of the performance issue.

[Edited by submannz - 6/18/2003 2:39:04 AM]

 

JohnD, exactly right, the synchros are very fussy, Subaru have a mod fix to help this, they removed some of the teeth off the synchros.

 

Always use Silkolene and it has been fantastic....

 

A vote for Redline High Shock here!!

 

A vote for Redline shock proof lightweight.
155000kms with 400hp on original box.