Based on reading various forums, Corvette, boating, etc., it would appear that we should plan on .38 to .50 pounds per hour per horsepower with our LS376-480. That is a wide range, for sure. With an ECU fuel injected engine, it is said we would be very efficient. Perhaps close to that .38 figure. What is your experience? I honestly don't know as this is all new to me!