GM OEM gear oil at Opel Astra MY10 4200km only UOA

[wlyszkow]

Hello,
UOA (sample sucked after 30 min drive - warm fluid) from few months used manual transmission - should be GM 75W-85 GL-4 there - in my opinion quite dirty and heavy ZDDP fluid (like racing 5W-30..) and MT is during break-in - I hope..

Comments welcome ;-)

The fluid was replaced with BG Syncro Shift II (75W-80 GL-4) + BG MGC - we will see the results after another 4200km..

 

[Trav]

With only 4200mi its still breaking in. Its normal for manual transmissions to shed small particles as parts become bedded and worn in together, i wouldn't sweat it.