Can a Buick Century Estate from 1980, in original condition, run on petrol E10, so with up to 10% of ethanol? I mean without the risk of causing damage in the longer term to the engine or fuel system.

 

Just about all manufacturers OK'd 10 % ethanol.

If the inlet needle and seat were not updated to use unleaded petrol, the original needle had a rubber point that would swell with unleaded fuel and cause problems.
A new needle point had Viton rubber that was more resistant to unleaded fuel and worked just fine.

 

Thanks for your reaction. My car runs on unleaded fuel only, so the needle and seat should be fine. But this is about the ethanol. I have also read in other topics that only cars from somewhere in the later 80's or 90's should be able to run on a certain percentage of ethanol. What is correct? I certainly hope you are right that my car can run on 10% of ethanol. Can you confirm this?