Coincidentally I do the fluid & filter change + new sump seal on my project car today. Used 8.5 litres, but I knew the TC & Fluid cooler were not full after the engine work. Used Triple QX DX III that my son got me discounted. Will check & top up (or drain some) next week once it gets all round the system.

Only problem was some of it squirted out the dipstick hole when I started the engine !! Should have started it before full, and then topped up !!