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Appendix B: Tailpipe Emissions of E10

Below are some studies been conducted examining the effect of emissions when E10 replaces traditional petrol (without oxygenates). Table B.1 shows a summary of the overall results.

Table B1: Summary of studies examining the effect of E10 on tailpipe emissions

Study details


Effect on emissions

Relevant information

1 Ragazzi, et al (1999) The Impact of 10% Ethanol Blended Fuel on Exhaust Emissions of Tier 0 and Tier 1 Light Duty Vehicles at 35 Degrees, CO DPHE 1999

Colorado, USA

An overall PM reduction of 36.0% was achieved

Cold weather study

2 AEA Technology (2004). Ethanol emissions testing. Prepared for United Kingdom Department of Transport, Local Government and the Regions, E&E/DDSE/02/021 Issue 3


95% probability that the 10% ethanol addition leads to a reduction in PM emissions of between 33 and 57%


3 Malawa, et al, Effect of ambient temperature and E-10 fuel on primary exhaust particulate matter emission from light duty vehicles, Environmental Science & Technology 31(5): 1302–7


Older vehicles burning 10% ethanol produced up to 22% less soot particulate pollution than those burning regular fuel

Cited in another paper – unable to obtain original

4 Beer T, Grant T, Morgan G, Lapszewicz J, Anyon P, Edwards J, Nelson P, Watson H, and Williams D (2001) Comparison of Transport Fuels: Final Report (Ev45a/2/F3c) to the Australian Greenhouse Office on the Stage 2 Study of Life-Cycle Emissions Analysis of Alternative Fuels for Heavy Vehicles. Australian Greenhouse Office, EV45A/2/F3C

Based on Australian and overseas research

No change in E10 PM emissions compared to Premium Unleaded Petrol

Unsure of original research – E10 information seems dependent on MacLean HL and Lave LB (2000) Environmental implications of alternative fuelled automobiles: air quality and greenhouse gas tradeoffs, Environmental Science & Technology 34: 225–31

5 Modelling the Effects of E10 Fuels in Canada – Robert Vitale, J Wayne Boulton*, Mike Lepage, Martin Gauthier, and Xin Qiu from RWDI West Inc and Serge Lamy Health Canada


Emission rates unchanged by the addition of E10 (PM2.5)

Study based on modelled data

Further summary details on these studies are available from the authors upon request.