Thank you, will keep that in mind! Was not too concerned since it is not smoking all of the time.JCC not unusual for any Supra given the age, unless a new/rebuilt engine...
Many of us us Marvel Mystery Oil to help with start up, Ive used it for many many years in all my older vehicles. My old '72 Chevy C20 Pickup lived on that stuff...
At oil change add a pint with 10w40 oil change.