Small Engines (Lawn Mowers, etc.): lawnmowers & lubeoil, leaded petrol, fuel additives

Question
I have an old lawnmower 55years old. It runs on leaded petrol. Now it has to run on unleded petrol. How much lubeoil will i need to mix with a gallon of petrol.
         Regards

Answer
Using the term "petrol" would make me assume that you are not from the USA- am I correct?

What your asking me is referring to putting a lead additive into your fuel.  I am not familiar with the product- lubeoil, but our fuel additives we sell here in the states has very specific instructions on how much fuel additive to add to the gasoline.


My suggestion is pick a fuel additive that you like and follow the directions or check with the manufacturers website to get the specific instructions. Generally it is just a few ounces of lead additive to a gallon of gasoline.

I know many of farmers here in USA that have been running tractors that were initially built for leaded fuels without adding any leaded fuel additive at all, including my father who has a 1959 Ford Jubilee.