Actually,driving with one quart of oil + half quart of seafoam is way more risky by driving your horse with that little amount of oil
But this is all about perception of what is the best way to clean the engine.
I've always did this two quarts of new oil flush proceed without any issues at all on all vehicules i've ever owned
And again,i never suggested driving the VX with only two quarts of oil;Don't know why you guys keep misleading my words.
However this guys engine is gone so there's nothing we can do more then helping finding a cheap,good running engine with less mileage possible.