I'm a fucking retard so forgive me. I have a 2001 oldsmobile,

I'm not sure if Oldsmobile had 3800's in them but if they do you want 5w30. To be honest a lot of GM cars from that era took 5w30 and I don't think any of them took synthetic.

Go with what GM recommends. Don't put in synthetic if it's not required, you could create oil leaks by doing that

>>14717520
Also if you do have a 3800 it takes exactly 4.3 quarts of oil. I'm not sure what that is in metric, just Google it

I would do high milage oil which is synthetic blend. Uses 5 quarts.

>>14717520
>>14717525
Thank you kind sir. May the machine spirit watch over you.

>>14717528
Thnx, good luck all.