Deep Thought Mystery Cache

The cache is NOT at the published coordinates. They have slight significance to me, but are unrelated to the puzzle.

The fun of this cache is simply the solving of the puzzle, so, unusually for one of my puzzles, the cache is a 35ml pot

This cache is placed on my Birthday. It is a significant birthday, but not one that ends in 0. Now that I have reached that age I know the answer. But what is the question?

So, lets start with the obvious answer. That is AB.

AB is also the number of US gallons in C barrels of oil.

AB has 3 prime factors. B, D and E

I had a significant milestone find recently. This was my 2F00th find

I've now been caching over 3 years. Find the date of my first find and add all the digits up. Now divide that by 2. You now have G

H = B+C

The cache can be found at N52 1(A+B).(D-H)FC W000 0G.(E+B)(D-H)A

You can check your answers for this puzzle on GeoChecker.com.

Congratulatins to MnM for FTF :)