the vehicle has 68000 miles

every sixty thousand miles should work out for you.

check your owner is manual to be sure (the timing belt is very important (you do not want it to break!)

l believe the interval for a timing belt change on a 02 Forester is 105,000 miles.

if your heavy footed every 60k if your easy on the gas than 100k should be fine. just have your belt inspected by a subaru tech. timing belt on the boxer engine is a pita to change.

60k miles
bite the bullet and try 80k miles

Inspect every 30000 and replace every 60000 (if not sooner per inspection)