On 29/08/2019 20:30, Tim+ wrote:
Chris Hogg wrote:
On 29 Aug 2019 18:20:06 GMT, Tim+ wrote:

More interested in the “correct” answer (if such a thing exists) than more
opinions.

Tim

There is no correct answer. 50:1 is only a general guide, a
rule-of-thumb.

Indeed, actual mixtures vary a lot between different engines but it was the
point about whether 50:1 = 1 part oil added to 50 parts petrol or whether
50:1 = 1 part oil added to 49 parts petrol making a 1 *in* 50 mixture.

Thats already been answered (and its the former).

"with petrol/gasoline at a volumetric fuel-to-oil ratio ranging from
16:1 to as low as 100:1."

Old Seagull outboards used to run on 10:1.



My BSA C12 used petrol to oil in the ratio 8:1.

Yes, it was four-stroke engine: it just leaked a pint of oil through the
seals and rings and the bore for every gallon of petrol I put in the tank.

Nick