It's more like 1989-2000 was 12-13 years. 2001 and up until 2008 or so was 15 years and 2009 to the present are 20 years or more. The 2009 Orion VII NG CNGs (#1700 was the 2008 pilot that was delivered in the fall of that year shortly after the #3800's started arriving) should be ATLEAST 15-16 years (tanks-wise), probably longer. The 2010-2011 buses should be the same if not longer and the 3Gs are about the same as the C40LFs in the city. In any case, why is NICE even getting these, I mean aren't they still in a contract with New Flyer? Those Advantage CNGs will never make pass 12 years, not with our punishing streets.