You don't happen to have it on jackstands at the front do you? If so, put the rear up too so that it is level. The fill till spill method only works if the car is level.
If the car is already level...
I'd put in 3 quarts and stop.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
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'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
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