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Additive nuisance

I DRIVE a 1980 Chrysler Sigma GL auto with the Astron 2000 engine, which I run on LRP. I visited, on your advice, http://www.aip.com.au/health/lead_guide.htm, but the Astron 2000 engine was not listed. Would I be able to use ULP and not have to worry about using PULP plus an additive? I'm 82 and I don't do many kilometres.

THE Aston 2000 engine has an alloy cylinder head with valve seat inserts. But they are not the variety to withstand unleaded fuel. You really should use an additive, but if I were in your situation, I would gamble on using unleaded without it. There will be a higher rate of valve seat wear, but because you don't do many kilometres a year, it will probably be a few years before you strike trouble. Another solution might be to use an additive every four or five fills.

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