Scientists are now developing a new such coating, that could extend the service life of engines by 300 percent. (newatlas.com)
And with higher - up stages, it could easily do close to 500BHP without noticeable impact on life of the engine or environment (but that required changing turbos, intercooler, and many other components - luckily, not 5G gearbox / transfercase, as that was capable of 1000Nm load from factory!). (evo.co.uk)
EPA estimated cost - effectiveness in its 1998 rule, «Control of Emissions from Nonroad Diesel Engines,» by discounting both the monetary costs and the non-monetized emission reduction benefits over the expected useful life of the engines at the 7 percent real rate recommended in OMB Circular A-94. (obamawhitehouse.archives.gov)