use of oil additives?

Does anyone use oil additives? i've just bought some lucas stuff from my local auto supplies the guy in there runs it in his old type r and swears by the stuff.
i was wondering if anyones got any experience with it or should i just go back and swap it for another liter of oil?

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cheers
 
Never used an oil additive before and don't think I ever would.

Renault don't recommend the use of them either.
 
Put a post in the Opie Oils traders section and I'm sure the oilman will post some help. Personally I'd just use a top quality oil rather than try to bolster a lower quality one with a stabiliser.