Search for: Introduction To Roth Automotive Science › Forums › Topic Tag: emissions Viewing 5 topics - 1 through 5 (of 5 total) Topic Voices Posts Last Post Engine combustion – What doesn’t burn? Started by: admin in: Engine 1 1 2 years, 4 months ago admin Spark Plug technology: Platinum, Iridium, or Copper Spark Plugs? Started by: admin in: Engine 2 3 3 years, 1 month ago admin Source of Hydrocarbon emissions Started by: admin in: Engine 1 1 4 years, 1 month ago admin Why do we need catalytic converters? Started by: admin in: Engine 1 1 5 years ago admin Are Diesel powertrains a good choice today? Started by: admin in: Choosing a New Car 1 1 5 years, 4 months ago admin Viewing 5 topics - 1 through 5 (of 5 total)