On B&S engines, if the dipstick is a turn and lock style; check the oil level while locked in place. If you thread (multiple turns) the dipstick in; then you check the oil level while resting on top of the threads.
Not what my manual for the '80s 3.5 & 4Hp engines says... States after wiping, to screw it in completely then remove to check level...
On the ones with the long dipstick tube that fits into the oil sump, I always added a couple extra ounces as oil becomes air locked in the tube when in operation...