Ah, real petrol with TEL, grey streaks over wings and cowlings.

Condemned to extinction by the worlds do-gooders, greenys and politicians who failed, or refused, to understand the chemistry.

Metallic lead being dangerous if you eat such items as roof flashings, whereas the TEL is necessarily catalysed from an oxide to a halide as part of the combustion process to clear it from the cylinders and is water soluble.

Infinitely more damage done by fishermans' weights and spent lead shot than the millions of tons of lead halide harmlessly washed away and bio-degraded. Hence the hushed-up lab results of the pre-Roman (pre-lead) preserved remains here that found the lead content in the bones identical to that of a 1960/70's (TEL heyday) cadaver. We'd find Sodium (Na) or Chlorine (Cl) quite deadly, but as NaCl or table salt it is virtually harmless and in fact essential to human life.

U turns are of course politically undesirable.

I think I've been here before, best shut up. . . .

R.