Hello We have now with all 3 cars in our circle of acquaintances with E85 broken catalysts. To first with my Golf 3 with 2 liters 16v then with a Nissan N16 1, 8 liters 16v of the precat and with our Renault Espace 3 with 2 liters 16v also the precat. Since all with E85 I thought it can not be a coincidence. Does E85 burn so much hotter? All cars had ceramic cat. Can be that the problem with metal cat does not occur. What I also have to mention is that a All cars except for my golf have been upgraded to E85 with a fuel sensor. My golf has been adapted to the characteristic field.