Hi Guys I'm fairly new here but have saw quite a few of the third gens with quite a few miles. As far as I can tell if they have been well looked after the b20a will last the longest without a rebuild. I know there is quite a few long time members on here and am curious of some of the highest mileage Ludes with out a rebuild. I know there is plenty of the b21's still going strong too and with the proper maintenance are very likely to last just as long or longer. I have had several hondas over the years and even by today's standards I believe these to be some of the toughest.