Neither one of these. Your car requires SAE 5w30 weight oil.
Lol 10w30.. I prefer 10w40 when it comes to higher milage cars
yea it should
10W40
I would go with 10w40.
Try some 10w40.
10w30
10w30
You should run between 30 and 35 PSI in the tires on your Buick Century. If you have older tires on the vehicle, you should run closer to the 30 PSI mark.
you should not be driving
Buick Century was created in 1936.
more then likely its 5w30 or 10w30
5w30 when its cold and 10w30 when its warm