If they're red they're in forced cooldown, wasting fuel. Forestry engines, like BC engines, always produce at their full rate. Higher temp makes them cycle faster, outputting smaller, more frequent energy pulses which are more efficient with conductive pipes. For maximum efficiency use power conduits.Plus Biogas engines will never explode and you actually want them at the red stage to produces the max MJ/t out of them. Refining oil and getting it is too much of hassle for an automated factory biomass is far easier and cheaper to automate and use.
You should use a still, because it is more effective to produce biofuel.you dont need to use a refinery to get biofuel you can also use a still
Plus Biogas engines will never explode and you actually want them at the red stage to produces the max MJ/t out of them. Refining oil and getting it is too much of hassle for an automated factory biomass is far easier and cheaper to automate and use.
I personally think combusion engines are just as 'easy' as biogas engines really now we have the Aqueous Accumulator from thermal expansion. I never had one explode.
Careful when FTB 1.4.2 updates as the Aq Acc has had a serious nerfing to it.