Just one more comment on fuel bladders. Toyota has told me repeatedly that it is "NORMAL" for a rubber fuel bladder to get stiff and ridgid in cold weather.

Having a bit of experience with aircraft, I can tell you that there are THOUSANDS of aircraft fuel bladders in use that stay loose and hold full capacity at 50 DEGREES BELOW ZERO. It gets VERY cold at 35,000 feet, and fuel tanks in wings are NOT insulated.

Toyota is just getting cheap and using an inferior rubber in their fuel bladder, then trying to lie to the consumer.

(Toyota, are you paying attention?)