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Location:
Brisbane
Registered:
May 2002
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Re: 22RE on Premium
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Thu, 08 May 2003 06:09
 
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Yeah, any 22R will be fine on unleaded fuel. It's a common misconception that lead is used to "lubricate" the valves, but that's not really what it does. The lead prevents the exhaust valves from "micro-welding" themselves to the seats, thus tearing chunks out and slowly eroding the valve seat. Any engine with hardened valve seats, which includes pretty much any Toyota engine with an alloy head, does not suffer from this problem so lead is unnecessary.
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