I just ordered the sample kit. Heck...they send the kit to you for free and it's only $25 to get it tested...you can't go wrong there for peace of mind.
Also ordered 6 quarts of 5W30 Redline today! 
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Stillen Gen3 CAI|Berk HFC and CBE|UpRev|15mm H&R front spacers|20mm Ichiba rear spacers|Stillen front and rear sway bars|Yokohama S. Drives|Swift springs|JDM Blinking Fog|8000k HIDs|9% window tinting, 47% on full windshield
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