LexusFreak,
Dealers are so stupid if you / they don't experience unusual behaviour (in test drive) they are not gonna say its affected, else you have to accept the charges for testing the engine for the problem as its on your request. I don't know howmuch is hourly rate for labourin Toronto, here it is $89. Its crazy for people(who care for their car, before it breaks) to know all these sludge issues and spend.