I have a huge selection of O'Reilly full synthetic from the $17.99 5 qt / mobil1 filter sale.
I ran it for 10K in my Blazer and I had my dad run it in his 04 Impala 3800 for 9K.
Seems to hold up well and although very black at 10K I doubt there were any problems.
As soon as my syn collection is gone I'm going back to conventional oils (I have two cases of Citgo Supergard Syn-Blend that I picked up for $1.24 a quart and 4 cases of Resolute (Fleet Farm House Brand) oil that I picked up for $1.35 a quart.
I've also used supertech and many other house brands without any issue.
I ran it for 10K in my Blazer and I had my dad run it in his 04 Impala 3800 for 9K.
Seems to hold up well and although very black at 10K I doubt there were any problems.
As soon as my syn collection is gone I'm going back to conventional oils (I have two cases of Citgo Supergard Syn-Blend that I picked up for $1.24 a quart and 4 cases of Resolute (Fleet Farm House Brand) oil that I picked up for $1.35 a quart.
I've also used supertech and many other house brands without any issue.