Viperoni, yes, all other things being equal, the less an engine revs, the longer it will live. However, an engine designed for operation at 2,000 RPM will not last as long at 3,000 RPM as an engine designed for operation at 3,000 RPM. Of course, the engine designed for 3,000 RPM will last longer at 2,000 RPM than it would at 3,000 RPM. Basically, engineering can overcome some of the effects of higher RPM operation, but not all of them. What I'm trying to say is that my Honda, which runs at around 2,750 RPM at 65, will not necessarily last less time than your Pontiac, although the extra RPM my Honda turns does not help.
Zenmervolt