It would be easier to offer advice if you listed what you have done. Besides the basics: plugs, pcv, air filter, coolant & cap, have you changed the gear oil in the transaxle, replaced the brake fluid and what about the 2 drive belts?Your cylinder head cover gasket should still be okay. But check around for signs of leaks. Also check the turbo oil return for traces of oil on the 2 allen head bolts. There's an o-ring in there that will produce a leak at some point.