Q: What transmission oils should I use? A: Generally, for all Evo's, use the best fully synthetic GL5 rated oil you can find for all the drivetrain (this does not include plated LSD's or the AYC system as these require special oils). The Evo 4-7 gearbox requires 75W/85W rated gear oil. Please note that the service schedule for the Evo's usually state anywhere from 26,000 miles to 45,000 miles for replacing the gearbox, transfer box and rear diff oils however, it is recommended on such a high performance car that these oils are changed sooner. Consider changing them every 9,000 miles to 13,500 miles or once a year. The cost is very small (£30-£50) and you will often find that the gear change becomes better when the oil is first changed on a new car. Back to question page