Home Third Gen Mustang 1984 Ford Mustang 1984 Ford Mustang Tune-up Information Maintenance Schedule Maintenance interval 7,500 15,00 22,500 30,000 37,500 45,000 52,500 60,000 Change engine oil & filter every 6 month or mileage x x x x x x x x Replace spark plugs x x Change crankcase Emission filter x x Inspect accessory drive belts x x Replace PCV valve x x x x Change engine coolant at 6 months or at mileage x x Replace air cleaner filter x x Check belat, hoses & clamps x x check exhaust heat shields x x Lub steering and suspension x x x x Inspect breaking system x x Inspect & replace front wheel bearings x x No Subscription? You’re missing out Get immediate ad-free access to all our premium content. Get Started Already a Member? Sign in to your account here.