I have an 89 ford mustang 4 cylinder. What kind of oil do I use?

[had_02]

I have an 89 ford mustang, what kind of oil should I use?

 

[brokensoul]

LOL 4 cyl Mustang LOL

 

[SVOMAN]

I would use 30 wt in the summer and 20 wt in the winter.. or 20/50 Castrol