1970 440..NUMBERS MATCHING CAR....
THE 440 HAS BEEN REBUILT PRIOR TO MY OWNERSHIP.

IT HAS AN MSD IGNITION, HUGHES CAM, TTI HEADERS...
I USE IT FOR SHOWS...AND GENERAL DRIVING PLEASURE...

IT BURNS A LITTLE OIL...NOT ENOUGH TO MAKE ME REBUILD THE ENGINE.

I HAVE BEEN USING CASTROL GTX 20W/50 PLUS SOME LUCAS OIL.

I WAS TOLD BY THE CASTROL COMPANY NOT TO USE THIS OIL...AS MY 440 HAS FLAT TAPPETS AND REQUIRES SOME ZINC . THEY SUGGEST CASTROL EDGE.
I WAS TOLD NOT TO PUT ANY TYPE OF SYNTHETIC OIL IN THIS MOTOR.

HOW ABOUT USING THE GTX 20W/50 WITH A ZINC ADDATIVE???
ANY THOUGHTS ?????
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