I doubt that it will have problems with the local fuel since it is an older engine and surely isn't that high in emission standards. Just make sure the Sorento is in good condition. Test drive it in various driving conditions. Hear for any weird sounds from the engine and suspension and look for black smoke. Look at the condition of the body for rust and the solidity of the interior. And do not get it if its got high mileage for its age (like say... 90000kms and above for a 2004 car), you'd most probably have lots to replace by then, unless the dealer replaced all of them (and showed you the receipts) before selling you the unit.