20-50 CASTROL GTX FOR ME IN THE SOUTH. PRESSURE IS KING WHERE HEAT AND A SUPERCHARGER IS INVOLVED.
IT SEEMS THAT THE
SYNTHETIC RECOMMENDATIONS ARE BEING CROSSED WITH THOSE APPLYING TO THE NEW-TECH ENGINES LIKE GM'S LS-1 AND FORD'S OVERHEAD CAM APPLICATIONS.
THESE ENGINES HAVE FAR DIFFERENT SPECS THAN MOST FOUND IN OUR COBRAS.
AFTER ALL, IT IS AGAINST FEDERAL REGS TO USE SYNTHETICS IN A PISTON AIRCRAFT MOTOR DUE TO HUNDREDS OF ENGINE FAILURES USING SYNTHETICS.
(THIS IS COVERED ON ANOTHER THREAD)
JUST BE CAUTIOUS. "SOMETIMES", NEW-TECH DOESN'T MIX WELL WITH OLD-TECH.....
OR OLDER MAY BE BETTER....WHO KNOWS ?? LOL...
B. SMITH