# What's The Difference Between Tier 2 And Tier 3 Diesel Engines? - SlashGear

> What's The Difference Between Tier 2 And Tier 3 Diesel Engines? Diesel engines in the U. S. currently dominate the on-road commercial sector and are actually the backbone of the country's logistics.

- **Source:** [SlashGear](https://www.slashgear.com/2212249/tier-2-vs-3-diesel-engines-whats-the-difference/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a5e8f62908cb7739fec960a)
- **Published:** 2026-07-20
- **Category:** Cars
- **Tags:** #tier #diesel #engines #between #difference #slashgear #actually #backbone
- **Canonical:** http://localhost:4321/a/6a5e8f62908cb7739fec960a

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._