I have a renault 9 TL from 1986. Bought it with 74.000 km I have rarily tanked leaded fuel and no problems what so ever. I your case I would tank leaded fuel till you passed the 60.000 km because then the engine is not dependable on led. So i heared from a renault mechanic / enthousiastic. I have am a very satisfied Renault 9 driver I am shoure you will also
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