I change My oil every 3K. Sure, the oil molecules might be ok for 7,10,15, or 20k but the oil still is getting contaminated by varnish, fuel, water and other particulates. Oil changes and reasonable intervals are cheap insurance, especially on engines that are run hard. :boxing:
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2004 Torch Red GT
Flowmaster Am.Thunder cat back, SLP Mid Pipe
Steeda Underdrive pulleys
3.73 gears
Diablosport Predator tune
Grille Delete and Mach 1 spoiler
Rear Wing delete 
Mustang Tuning Shifter
Bullitt Handling Kit
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