oil testing

I really need to find out if anyone knows if oil(from when I changd it) can be tested to see how old it is and if anything has been added to it? if so how/where can i get it tested?

Thanks in advance for any information possible!!!

i was just wondering if anyone knows if oil can be tested to see how used it is and if anything has been added to it? if so how can i get it tested?

Yes, your oil can be tested. Are you running regular motor oil or synthetic?





http://i5.photobucket.com/albums/y186/lizzywiz/gtp.jpg
Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials
1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.

regular. i was just wondering because i got some work done and they had to change the oil but a little over 2000 miles later i got a collapsed rod and they said the oil was contaminated(now i need a new engine and the warranty company wont pay anything). i had changed the oil 2 days before i gave it to them to try to stop the knocking and the oil the first place "changed" was completely black and i was wondering if they had maybe just used the old oil since i found out they are a shady business