T.E.L. to help protect valves from regressing.

[rustybronco]

Yes, both potassium and sodium based.

From what I've read, under light to moderate usage, the lead replacements appear to perform adequately 'in most cases'. High temp, high load not so much.

Neither is a drop in replacement for T.E.L.

Going to get me a fiver of 100LL, mix it with 87UL and dole it out in the Beemer and my W-6.

[chuck hahn]

Would any of the lead subs be of any value in the GS engines Dale?????

[rustybronco]

In my opinion and what I can tell so far, there is no need to use T.E.L. or a T.E.L. substitute in any of our engines.

What I do think, it's a good idea to run valve clearances on the larger end of the scale. That way more of the heat gets transferred from valve to seat than it is to worry about using lead or a lead substitute- in these engines.

Not an expert on the matter. Just was worried about valve seat regression.