HELLO, JOHN,

MY UNDERSTANDING IS THAT IT IS ADVISABLE TO LET THE RINGS SEAT PROPERLY BEFORE USING SYNTHETICS. IN NORMAL DRIVING CONDITIONS THIS SHOULD TAKE 1500 TO 2000 MILES.

I HAVE ALWAYS USED 3000 MILES AS A PERSONAL "MINIMUM" USING CONVENTIONAL (DINOSAUR) BASED OILS, AFTER WHICH I HAVE SWITCHED TO SYNTHETICS.

I HAVE BEEN USING CASTROL SYNTEC AND HAVE HAD NO PROBLEMS. PART OF MY PREFERENCE IS BASED ON THE FACT THAT I HAVE ALWAYS USED CASTROL PRODUCTS. ALL THE WAY BACK TO MY RACING DAYS IN THE 50'S & 60'S WHEN I USED "CASTRO-R". MAN, I SURE LOVED THE SMELL OF THAT STUFF. THERE ARE SEVERAL THREADS REGARDING OILS & ADDITIVES AND SOME VERY CONVINCING ARGUMENTS ARE MADE FOR DIFFERENT PRODUCTS.

I GUESS PERSONAL PREFERENCE AND HABIT AND PRODUCT LOYALTY ENTERS INTO IT FOR ALL OF US. I'M A "LEG MAN" MYSELF.

HAVE A REALLY GEAT DAY,

BLACKJACK