janroger64
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Can I use unleaded fuel in my 74 Bronco with a stock 302 engine? In the Dennis Carpenter catalog they say that 75 was the first year for unleaded fuel.
Unleaded fuel...
- Thread starter janroger64
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FYI
The "lead" was an additive., started many, many yrs. ago to ***** cushion, extend the life of your valves.
The "UN" in unleaded is NOT like "decafing" coffee... in that the caffeine is/was always there, in the bean., & had to be removed.
NOT ADDING "lead" (to gas) req. Mfgrs. to use "hardened" valves, seats.
Back at least 15-20 yrs., eng. rebuilders started using hardened valves, seats.
Soooooo., it's likely, if your eng. has been re-built... it has the later valve design.
If eng. has not been re-built....not to worry....the wear is very slow.
The "lead" was an additive., started many, many yrs. ago to ***** cushion, extend the life of your valves.
The "UN" in unleaded is NOT like "decafing" coffee... in that the caffeine is/was always there, in the bean., & had to be removed.
NOT ADDING "lead" (to gas) req. Mfgrs. to use "hardened" valves, seats.
Back at least 15-20 yrs., eng. rebuilders started using hardened valves, seats.
Soooooo., it's likely, if your eng. has been re-built... it has the later valve design.
If eng. has not been re-built....not to worry....the wear is very slow.
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I put 225k on my EB with unleaded gas. The previous owner had put on about 150k+ (he said he broke the speedo cable 10 years before I bought it) prior to that, so who knows what gas he was running. When I finally had to rebuild a couple of years ago, well, lets just say that after over 400k miles she was due. So you can see by my experience how hard the unleaded is on them. 
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