Im looking at buying a car....its still running a leaded (4 star) cylinder head.....

How well will it run on addatives?

Will the engine cope with it or should I really be looking at doing a conversion?

(Oh, its a 2.5l straight 6 if anoyne wants to know)

Should be OK with a quality additive. Keep a check on the valve clearence's; They'll close up if the valve seats are wearing. Watch out for it pinking; might need the timing backing off. Worst case, you'll have to have the head off and hardened seats fitted at some point (OK, not worst case but...).

adrian

Castrol valve master + i have used it for years with no probs

quote:

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Originally posted by tegwin


(Oh, its a 2.5l straight 6 if anoyne wants to know

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i ran my vitesse 2l 6 for years with no additive, no valve seat errosion or damage.
if its injection check the fuel pipe is ok for unleaded?

the unleaded conversion from a good local engineer is only about £100.

I work with a guy who has a Vitesse and it runs on nornal unleaded and had done so for over 40,000 miles.
It doesn't get thrashed up the motorway though!

I ran my Mini on lead additive and octane boost and it did make a difference, it was smoother and picked up better. It was not psychological either as other drivers noticed it as well and they didn't know it was in.