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Let's make this REALLY simple. You're a little guy inside the cylinder head standing next to the intake valve. The valve opens the the piston draws down. You've got a bucket of fuel in one hand and an eyedropper in the other. If you dump the bucket when the valve opens, the fuel zooms into the air streaming by and disappears into the cylinder. The next time the valve opens you squirt the fuel in your eyedropper into the air streaming by and disappears into the cylinder. The eyedropper is the LEAN BURN. You will NEVER use as much fuel as the bucket. I don't care about how efficient the design of the engine is either. Don't care about variable valve timing, turbocharging, high lift cams or any other trick you might find being used on engines. Any particular engine is still just an air pump. The ATMOSPHERE is the driving force pushing the air into the engine. If you mix less fuel with the air supplied to the engine you save. Your driving habits and unreasonable expectations of engine performance is the real problem. Less fuel being pumped into the engine yields less BTU's of energy available per revolution of the engine. It is going to take you longer to climb that hill. You are going to have a harder time fighting against a head wind. There is only so much available energy in each gram of fuel. You cannot get something for nothing. If you insist upon no compromise, your lean burn efforts will be negated. NOTHING in any formula or theory is going to change this. Smokey Yunick produced the leanest burning engines ever. The engines ran so hot it was like they were inside a furnace while running. Lean burn runs hot. Some engine parts can literally melt. Lean burn will produce extremely high engine efficiencies. Smokey Yunick was the KING of lean burn super efficient engine design but even he could not extract more BTU's from each gram of fuel than what was available.
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