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**truckster** · 12-10-2012, 07:02 PM

Tetraethyl lead, which was formerly added to gasoline as an antiknock agent, had the added advantage that it acted as a lubricant for valves, particularly for the exhaust valves. As burb71 stated, it's been gone for a very long time. If your engine were going to be damaged by a lack of lead in the gas, it would have happened by now.

Regular gas will be fine. The biggest problem you will have is not from the lack of lead, but from the addition of ethanol to gasoline. Ethanol is not friendly to fuel system components that weren't designed for it. When you get to the point where you need to replace fuel system components, particularly a carb rebuild, make sure the parts are compatible with e10, which is 10% ethanol and is the gasoline you'll find almost everywhere.

12-10-2012, 07:02 PM	#5
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 8,029	Re: 68 C20 gas question Tetraethyl lead, which was formerly added to gasoline as an antiknock agent, had the added advantage that it acted as a lubricant for valves, particularly for the exhaust valves. As burb71 stated, it's been gone for a very long time. If your engine were going to be damaged by a lack of lead in the gas, it would have happened by now. Regular gas will be fine. The biggest problem you will have is not from the lack of lead, but from the addition of ethanol to gasoline. Ethanol is not friendly to fuel system components that weren't designed for it. When you get to the point where you need to replace fuel system components, particularly a carb rebuild, make sure the parts are compatible with e10, which is 10% ethanol and is the gasoline you'll find almost everywhere.