I HAVE received conflicting advice about what fuel I should use in my 1983 Ford Telstar. I have been running it on premium unleaded with an additive, but have been told some Ford engines of that period don't need premium. Can you clear up this confusion?
IT depends on the compression ratio of your engine. When it was sold new there was a choice of standard and super petrol. Standard had an octane rating a little below the 91 of the current unleaded, super was 98. Most cars of the time were running super and I believe that would be best for your car, with an additive for protection of the valves and valve seats.