using alot of oil

[webi]

hi i have a yamaha yb100 1988 and when i top up the oil it only lasts for about 5 gallons does this sound right to you?

[chris66]

i take it you mean two stroke oil.

one litre bottle at aprox 40/1 mix should last 40 litres

about 8 gallons.

if your using half litre bottle of oil then your about right

if you mean you are compleatly filling the two stroke container then you are using much to much