Help with getting the most from my next samples

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I am about to send in a 5k mile scheaffers 10w30 sample along with a 1500 mile 10w40 castrol GTX with ARX, then the flush which will be a 2000 mile castrol GTX 10w30, now I usually get the regular 20 buck oil analysis for blackstone but I didnt get any oxidation, nitration or anythign like that, not that I know wahta that means, but I just want to make sure Im getting all the info I need to determine everythign is working like it should be. Is there anyhting I should ask for specifically with tehis ARX and its flush oil? Also after all that I am going to try the 0w30 german syntec.