I RECENTLY (FEB 26, 2007)TOOK MY O4 LT(45,500 MILES) TO WAL MART (STORE #1983)AFTER DOING SEVERAL OIL CHANGES MYSELF USING CASTROL SYNTEC 5W-30. WHEN THE SERVICE WRITER (WOMAN IN HER 40'S)ASKED ME WHAT TYPE OF OIL I WANTED, I TOLD HER CASTROL SYNTEC.
SHE THEN TOLD ME "ONCE YOU GO SYNTHETIC YOU CANNOT GO BACK TO REGULAR MOTOR OIL"

IS THIS **** FOR REAL? IS WAL MART TRYING TO SELL PREMIUM OIL CHANGES BY STRETCHING THE TRUTH?
ANYWAYS I WOULD LIKE AS MANY RESPONSES AS POSSIBLE TO CONFIRM THIS.
ALSO I THINK THE NEW SS TB'S ARE BAD *** AND I LOVE THE YOUTUBE VIDEO'S WITH THE WHITE SUPERCHARGED SS
FASTER THAN A VETTE! SICK AS HELL

LIKE A ROCK!

 

You can go back and fourth with out any problems. You can even mix them hence the synthetic blends. They're full of bull.