wives tail my ass.... Synthetic has smaller molecules allowing it to pass through small cracks or worn seals that regular oil cannot. Look it up if ya don't think so..... Switching to synthetic oil on a higher mileage engine is not recommended because of this. Same as a trans flush on higher mileage transmissions isn't wise either.

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99 xlt, 5.0, torsion bars cranked, 4" body lift, 33" Goodyear Duratracs, 15x10 American racing 5 spoke rims, 2004 ranger edge seats, buggman LEDs in dash, Aussie locker in front, 8.8 with discs and mini spool in rear, blue led underglow.