4094 divided by 2 is 2047 male anscestors. The average volume of semen per ejaculation is roughly 3 mL on average.
2047 x 3 is 6141 mL of cum or 6.14 L of cum or about a gallon and a half.
The average fuel efficiency for cars in the US (sorry Europeans) is 25 mpg. This means if cum had the same energy density as gasoline you could travel roughly 37.5 miles on all the cum your male anscestors produced in the last 400 years.
That's only one ejaculation per male ancestor. You can safely assume that the average male ancestor ejaculated more than once. This would increase the distance traveled using the cum energy.
I think it's fair to include jizz blown into your 12 generations of grandmas prior to your conception, though, because that cum was necessary to eventually lead to you being born. Scientifically speaking I think we're talking about all the man mayo that went into your grandma's hoochie coochie prior to your conception, but excluding any baby batter that went into the making of your previous older sibling. So we're only counting the clam sauce that led directly to you, not any of your siblings or any other combination of parents.
According to Leitzmann et al 2004 the average number of male ejaculations in lifetime is approximately 8700 times. That would be 26,1 litres of cum per male.
Edit: 2047 male ancestors would have produced roughly 53 427 litres of cum. Do we have data on energy density of cum?