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Lead additives?


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This must have been asked a trillion times before, and I am pretty dumb at the search function, try a couple of times without finding suitable references. :sleeping:

My is a 90 Esprit Turbo with Dellorto 45 carburetors, does it need lead additive to go with the unlead fuel to preserve the valves? How often and what quantity?


Edited by rikki16vt
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Looking at:

it seems super or boggo unleaded is fine.

Cool! Thanks for the pointers, seems like ever since the Turbo Esprit HC, the engine can already handle un-lead fuel.

86 Turbo Esprit HC

Mahle-forged pistons brought the increase in ration from 7.5:1 to 8:1; Nikasil process for the liners was specified once more. Lotus rather reluctantly joined the European low-lead petrol age stating: 'The new Lotus turbo engine can be safely operated on unleaded fuel (minimum 95 RON). We recommend 4 star (98 RON) for maximum engine durability.' In other words, 'don't call us if it pinks a pistion to death . . .'
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