If the fuels are sealed, they might be ok. Do you have any idea how old they are? I used to use Red Max all the time but I thought they disappeared long ago

Saitos tend to like high nitro. 15% or higher, but check the manual

Here is what I would do, I am sure others will have different opinions. Some will say just toss the fuel

i would get a gallon of fresh fuel, 10 or 15 %. Break in and run the engines. Get a tach and make note of Rpms. Then try some of the fuels from this batch and see if you get similar performance. The big question is if these fuels have absorbed water.

The Saito and your BB engines probably have different break in procedures. Make sure you follow the directions

Let us know how it works out

bob