Recently changed my manual gearbox oil since the Shockproof that was in there had been there for about 30,000km lol.
About 2.8L came out, replaced with about 3.3L of Syn75.
Immediately felt the difference - I can barely get it into 2nd gear anymore, even when it's warm. Will also crunch/collide on its way from 1st to 2nd, and occasionally from 2nd to 3rd.
SIGH. The next time the oil's changed in this box, it's because it's being rebuilt. Piece of shit. Also disappointed with the oil making gear changes WORSE than when it had 30,000km old Shockproof in it.