Man, definately the beggining of a blown motor, luckily you shut it off in time, if it's not a bottom end noise, you probaly just need an oil pump, but could have been worse, you could of heard a rod, or main bearing give out,
man you run nice and quick times, you should upgrade to an a4, or d.s.s, but hah easier said than done, im barely paying for a t-5, i pray my oil pump holds up throught the 200k mark. good luck buddy
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90 lx coupe: 175k miles, steeda water pump pully, hurst shifter, Mac cold air fenderwell, accel supercoil, ADS chip, aluminum D/S, Black magic fan, 3.27grs.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607
next mods: subframes, mac h-pipe