To learn John Travolta, Olivia Newton-John - (From Grease) The Grease Mega-Mix chords, your practice should emphasize these chord progressions: G, C, G, F, C and F. Kick off your practice at a gentle 40 BPM, then escalate to the song's tempo of 80 BPM. With the song's key of C Major, set your capo to fit your vocal range and chord choice.