The synthetic I am familiar with, will give you between 6% and 10% more horsepower on the dyno, or approximately 300 more rpm in a boat at full throttle, not to mention easier starting, less plug fouling, less wear, cooler operation and longer engine life.
Bob
Okay, I have question then. Can you switch to synthetic after having run dino juice for 28 years?
Someone here on the 'bolt said something about only switching on a newly rebuilt (or new) engine. Something about seals, gaskets, and piston rings.
