Citgo claims there 5w20 and 5w30 are over 50% synthetic. That seems to be a good deal for under 2 bucks a qt.
No Citgo bashing please the topic will get closed.
http://www.docs.citgo.com/msds_pi/10002.pdf
No Citgo bashing please the topic will get closed.
http://www.docs.citgo.com/msds_pi/10002.pdf