I heard aluminum blocks begin to become radioactive at 1500 miles unless you are running 91 octane then they start to become radioactive at 786 miles. By the time they have 3500 miles on them the whole car is radioactive - which in a way is an advantage because they are easy to find at night in the parking lot if you forget where you parked. You just look for the soft blue glow and presto!
The Yucca Mountain complex has a special parking lot for Cobra's with aluminum blocks, so safe storage is always available.
There is also some concern about the aluminum attracting interdimensional and transdimensional beings from an alternate universe, which of course is always problematic.
Well that's about all I heard. Time for another adult beverage ...
Ed
p.s. That other joker that's been pissing on your block probably had too many adult beverages (
hic) you shouldn't let him near your car that stuff is corrosive!