A warranty can easily be voided if the operator does not comply with the terms spelled out in the warranty. Proper oil changes - filter changes - etc. If the warranty spells out improper fuel then that could be a sticking point. I have no idea. I have no knowledge. I would have to see the fine print in the warranty and know exactly what the wording means. I once had a car that spelled out if you put rust-proofing or undercoating on the car and the car rusted you voided the warranty - spelled out clearly - but the dealers still put the stuff on the cars. Facts are facts and without facts we know nothing. Speculation is not fact. No one but the vehicle manufacturer can provide those facts.
