[OpelNewb]

newman try a different brand or weight. I run 80/90 in all my manual trans cars with the exception of my Subaru due to having a rather expensive center diff inside. I always use Castrol brand in daily drivers. HTH

 

[OpelNewb]

Another trick I used when changing the oil in my cars is to take a little extra clean fluid and before I put the drain plug in and kinda "flush" it out. This could help get out any junk in there. Also idk if they make one for the Opel but a magnetic drain plug would be handy.

 

[OpelNewb]

You more than likely have to "thick" of fluid in it. Or there is some trash in the fluid.