I am not "wasting" any dollars nor do I use any lead-replacers. I don't use any of my older gas stuff hard enough where it is an issue. Besides that - near all my older gas engines have hardened valve-seats installed. My only engine that does not is my 1960 Deere 1010. On that - I did an el-cheapo valve job by just grinding the seats and valves. It had awful valve-seat recession after that. In fact it was so bad - the engine stopped running twice since the valves sunk so bad, all clearance at the rocker-arms was lost. But after awhile it stabilized and have not had to re-adjust in few years now.
Valve-seat recession was a much bigger issue in other poorer countries then here in the USA when lead got dropped from gasoline. Lots of tests showing the difference and what additives worked at the time. Kind of old news now and I have no idea what would be in a modern day "lead replacer." If I really needed it - I'd likely pull the head off instead and put in hardened seats. Better long-term fix.
I have not recommended to anybody that they pay for a lead replacer. That said, I know for sure that some of those additives helped reduce seat-recession. I see a lot of history getting re-written with things that were once news. Maybe I am cursed with a good memory and take issue with some of it.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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