The Mystik JT-8 Synthetic 5w30 oil is on sale at fleet farm for $2.99 a quart and i was thinking about running it in my non di 2008 saturn outlook since the oil has the GM 6094 cert. How long of an oci could i go on this oil. Is this a decent oil? I understand from reading old posts it is made by citgo. If the oil checks out i may buy a stash of it and run it through my corolla also.