I agree with both zip and zulu.
I would also like to point out that the effects of adding a diuretic to an ACE or ARB were known long before these drugs were even brought to market. See:
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=372606
This was a study on dogs done back in 1978 using the first ACEI (teprotide) and ARB (saralasin). Note that the BP lowering effects of these drugs were only seen when the dogs were "sodium-depleted". In fact, they induced this condition on the test group using Lasix and a low sodium diet.
From this, it seems logical that if you are on a high-sodium diet, Benicar (or any ARB or ACEI) won't do anything for you. It also seems logical that a low-sodium diet (and/or a diuretic) will enhance the BP lowering effects. And, we knew all this back in 1978.
Pal