Originally Posted by HighlandPete
I'm not sure anyone is thinking damage, but causing damage and assisting longevity are not the same thing.
Premium fuels typically have a higher dosage of cleaning detergents and lubricity enhancers.
ULS diesel was the cause of a lot of injection equipment failures when first introduced, as sulphur has lubricity properties. Hence why products like Millers were used by many diesel users to combat the lubricity defficiency.
Yes this is true and I used Millers when I was unable to buy new cars, I believed in it and used it all the time, to what result