Foxeye fuel light - adjustable?

[Jamieg285]

I feel better knowing that mine isn't the only one that behaves like this, and it may be normal behaviour.
I am wondering if they changed when the light comes on ( maybe not deliberately) between box an foxeye, as my box used to come on just below the quarter.

I'll just treat my light an an indicator that its time to fuel up, rather than an early warning.

Thanks for now all the replies