Re: Can my Alfasud use unleaded.
Considering the cost of valve seat replacement is now madnesss relative to what it once was (before this unleaded fiasco started if you tookyour cylinder head to my local engine shop, they would replace all the valve seats in an 8v head for about £40. When the u/l hit, the price soon tripled!), you'd be far better off running the car and ,as was suggested earlier, keep tabs on the valve clearances. If they suffer get the seats done. If not, don't ,and spend the money elsewhere (pub etc)You've nothing to lose.
I tried the Arna on u/l with a lead replacement/octane booster, and packed that in when I checked it's compatibility, reset the timing, and got better starting, running and performance with u/l on it's own!