How often do you change syntec oil?

Question

How often do you change syntec oil?

Answer 1

I recommend synthetic`oil, even for older engines.....I've been using it since 1983.    There is a long complicated reason, but for all but a very few engines, change it once a year,  when your doing the "winterizing" or storage procedure.

Answer 2

IF ITS FULL SYNTEC 5 MONTHS OR 5000 MILES WITCH EVER COMES FIRST