"Derek" wrote in message
...
Friend has a petrol lawn mower, runs on 4star petrol, can he use unleaded
petrol,
He says getting 4star difficult


If its a very old machine then tell him to use an additive. These are
available to emulate leaded petrol. If not so old it will probably do little
or no harm. The most common problem after using unleaded in leaded engines
is the valve seats will wear more quickly.

Mike