Fuel Saving Tips
While many Spark Plugs out there tooting better MPG are dubious, Denso (OEM Toyota) Iridium plugs do provide a NUDGE better MPG. Although pricey, they are in (the same 1NZ-FE engine as my Scion xA w/o) in the more fuel efficient Toyota Yaris. Test data from Denso and modders suggest a very modest ~1.5% gain (eg like going from 30.0 to 30.5mpg), so don't expect a huge increase! Still, every bit helps when squeezing out those last MPG!
posted by babygdav on December 18, 2010
this tip works for 33% of voting Fuelly members.