Report from the forums:

( https://forum.kerbalspaceprogram.com/index.php?/topic/117090-wip13-sstulabs-low-part-count-solutions-orbiters-landers-lifters-dev-thread-08-28-17/&do=findComment&comment=3157170 )

I have just installed SSTU mod and using Real Fuel too and I have the following bug.

When using the SSTU - SC TANK - MFT-A - Standard Tank amount of fuel in the tank will stay at 2kL liter instead of increasing when size or diameter is increased.

Do you know why is that? Am I missing something?

EDIT: Btw, same happens with the Spherical Tank...

I'll try to see if I have time to check in the next couple of days.

Hmm... did quick test with latest RealFuels, and everything seems to be working fine. The volume in the RF GUI even updates immediately on diameter changes.

Yeah, everything seems fine to me as well

I'm thinking that the reported problems were due to a mod / game version mismatch of some sort, sounded like he was still on 1.2.2. Will post on the forums to see if anyone else is having problems / has more info on it, and if nothing turns up, will call this one 'solved'...