MC8 Fuel gauge measures auxiliary fuel?

[Dave5Cs]

My MCI is also 144 and I can get 142 in it by waiting for the foaming to stop. my genny runs off the same tank no Aux tank. If I let it go lower than 1/2 a tank it will not be high enough to run the genny but thats so you don't run all your fuel out.

[windtrader]

Thanks all for confirming gauge reading vs actual volume. It is really nice to know how you might venture to the next cheapest station and not run out.