From "The Times" today ref Formula 1

Article 6.5.5 of the FIA's technical regulations states: "No fuel on
board the car may be more than 10C (50F) below ambient temperature".

(Of course the actual 6.5.5 simply leaves it at 10C with no conversion
so FIA are for once in the clear!)

How did these reporters manage to pass the statutory GCSE in science?
Of course, you might blame Google which simply converts 10C to 50F
without any caveats.

Oh dear!

The Times is dreadful for its ridiculous conversions. I have seen
such nonsense as "the height of the waves probably exceeded 10 metres
(32.808399 feet)"

Jack