In regards to the engine failures at the nationals, we did some research to find the true cause of the engine problems and asked those racers what they found when they disassembled their broken engines. It's my understanding that they all changed to a new rod as suggested by the engines importer just before the A-main. Later upon disassembling the broken engines it was discovered that one engine had a wrist pin clip come out that destroied the piston and sleeve, another engine had the lower end of the rod break just above the crank pin. We're still waiting for a response from the third driver but I will post the response when available. In no way can a loose wrist pin clip or a broken rod (above the crank pin) be blamed on fuel! In fact these racers were using the fuel for several months prior to the event with total reliability. It's a real bummer when these things happen and it's only natural to try to find the cause.