I have just bought a secondhand Victa lawnmower which goes fine.

However, could someone give me some help on the proper ratios for mixing in
two stroke oil with petrol.

The Victa website recommends 50:1 (50 parts unleaded fuel to 1 part oil) for
Victa's high performance "Formula V" oil, and 25:1 for other 2-stroke oils.

Any advice or shortcuts will be appreciated.

Cheers

Peter