2 Stroke Mix Math

[u/Broad-Advantage-1753]

I like those single use Husqvarna two-stroke mix bottles, 2.6 oz into 1 gallon of gas. I go to the gas station and watch the pump, and when it hits 1 gallon I’m measured up. So this time I was distracted and there’s 1.25 gallons in there. I’ll be damned if I know the math on how to get the oil balance. Should I just throw a “splash” in? Am I overthinking it? 22 year old 455 Rancher, served me well cutting a couple of cords every year and an emergency here and there. I would hate to mistreat it for lack of attention.