Antifreez type 1991 volvo? 4cyl - 1991 Volvo 740

Volvo would like you to believe you need their o.e.m. and pricey anti-freeze to keep your cooling system from falling apart. NOT! Any good quality anti-freeze will perform well. Just be sure to mix it 50-50 with water when adding or changing, or using the 50-50 premix that's sold ready to use. More expensive because you're paying anti-freeze prices for water! I have used off-the-shelf anti-freeze in all my Volvos, which run 300,000 miles or more. You can extend the life of your radiator, water ump etc, but flushing the system every year or so, draining off the old coolant and adding a fresh mix.