by Bryan9000 » Tue Nov 03, 2009 1:13 am
as mentioned you may be able to put an additive in the fuel tank with every fill up, Redex is a good make to use, but there are many out there to decide from, most of them are made in the same factory, they just have different labels on them.
the costly way is to attempt and and get a "unleaded cylinder head" for the engine,it will include all the valves it's the valves which need the lead to stop them from burning out this may be quite costly, based on how long you plan to keep and run the car for, it may work out cheaper to do it this way than keep purchasing the additive I mentioned above.
for example
250 for cylinder head
10 for each bottle of fuel additive
that means after 25 bottles, its really costing you more money to purchase more bottles of additive, than it could have done to get the cylinder head replaced.