Ken's East Bay Hotel Corn Chowder

• 700 ml milk
• 700 ml cream style corn
• 450 gr potatoes (peeled)
• 700 ml chicken broth divided
• 130 gr carrots (chopped)
• 100 gr celery (chopped)
• 60 gr onion (chopped)
• 30 ml cooking oil
• 16 gr flour
• 8 gr cornstarch