So, I like the straw. It allows a boiler to run at 100% all the time, instead of dropping for a little under a second during the period after the fuel runs out, but before it's re-fueled.

So, you put a straw and Lava, and you have a boiler that doesn't occilate slightly. However, if you want a super-charged boiler, you have to use blaze-cakes, which leads to the same issue as before. So, what if we had a way to lead to them being super-charged via a liquid fuel, allowing us to maintain the 100% boiler up-time. So, here is what I propose:

Blaze-Fuel. It's effectivly a liquid blaze-cake, for use with straws. You make it by mixing in a super-heated basin 1x blaze-cake, 250 mili-buckets bio-ethonal and 250 mili-buckets lava. The burn time will equal the burn time of the blaze cake (BC for short), the burn time of that much lava (L for short), and the burn time of that much Bio-Ethonal (BE for short), times 1.25. That leads to (BC+L+BE)*1.25

That makes it more efficient than any of those fuels!

I just think it's a simple, useful Quality of Life feature.

Ultimatly though, it's your mod and your choice!

Doesn't biofuel do it already?