You should go start a site called something like

www.isuzu-engines-suck.com and focus it on bringing attention to your perceived problem. When someone's engine fails around here, point them in that direction. You'll start getting testamonials, and perhaps you can put together some sort of compelling arguement.

Do like the acura dudes did with their transmissions.

It took them 2 years, but eventually they owned up to the problem.

(I'm still not convinced theres a problem with the engines)