Dana's Fry Sauce

I grew up in Utah where they serve fry sauce to dip French fries and onion rings, instead of just ketchup.  When we're traveling we eat at fast food places and I always ask for mayonnaise and ketchup so I can make some fry sauce to go with the fries.  It's not quite as good without the pickle juice, but it's still good.

Recipe:

1/2 C Dana's mayonnaise
1/3-1/2 C Dana's ketchup
1 tsp dill pickle juice (hamburger chips)
1 tsp pickled jalapeno juice
1/8 tsp black pepper

Mix all together well and let sit for 15 minutes or so.