I'd say do the switch on oil..unless you have an visible leaks, cause then it'd all just run out. lol. PICS!
If you are just daily driving it and not beating on it, it's NOT worth it to go synthetic. It costs more for the oil you won't have any noticable gains vs a well maintained engine on regular oil unless you are EXTREMELY picky. Just stick with a regular reputable oil like Mobil1, Pennsoil, Castrol, etc.toyota16 said:hi, forgive me if type size is wrong. anyway I have bought a 95 AE101 hatchback 4afe engine and 4 speed auto trans. Genuine 45000kms. Is it worth switching to fully synthetic engine oil or a blend or stick with mineral oil. any other advice would be appreciated. thanks,