It's the valve stem seals, either take the cams out & replace them, or deal with it until you have more than $2-3 in parts to open the valve covers.
Never use Lucas shit, or any other additive for that matter.
See this link.
http://bobistheoilguy.com/images/lucas/lucas.htm
That shit causes problems.
Daniel, if someone replaces leaking valve stem seals , and they still link. They installed them incorrectly, or installed the wrong seal & it warped itself from the extra heat - which falls back to installed incorrectly.
That & there may have been more than one leak.
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Toysrme257th - AIM about anything, anytime; including v6 turbos.
World's second ES 300/3vz-fe Turbo.