Yes, you can:
$this->db->begin();
$this->manager->executeQuery("INSERT INTO Cars VALUES (NULL, 'Lamborghini Espada', 7, 10000.00, 1969, 'Grand Tourer')");
$this->manager->executeQuery("INSERT INTO Cars VALUES (NULL, 'Lamborghini Espada', 7, 10000.00, 1969, 'Grand Tourer')");
$this->manager->executeQuery("INSERT INTO Cars VALUES (NULL, 'Lamborghini Espada', 7, 10000.00, 1969, 'Grand Tourer')");
$this->db->commit();