No it's not correct, you can switch back to basic sewing machine oil for what ever reason you have. Triflow is basic mineral oil ( like sewing machine oil) added a bit of extra solvents and teflon. You will not gunk up anything on her machine with fresh new oil of the right kind. If it's nosier than your machine it's not due to Triflow; it's most likely need more cleaning and oiling to improve regardless of what you use. Triflow should make it extra smooth though, teflon in a good oil works well.