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Reformulated Gasoline Parameters by Reporting Year 

Note: This information is based on individual RFG & Anti-Dumping Batch Reports from Importers and Domestic Refiners. California gasolines are not represented in this data. This information is 

derived from report data and was not measured directly by EPA.

Each parameter value is a volume weighted average calculated when a volume and a parameter were both reported - parameter values are not typical for the total volumes listed. RFG volumes 

may not account for oxygenates added downstream. Parameter averages were compiled individually and may be subject to errors in reporting.

The Oxygen(wt%) average values were calculated only when an Oxygen(wt%) value greater than zero was reported. All Oxygenate(vol%) values (MTBE, Methanol, Ethanol, ETBE, etc.) were 

calculated as a group based on the presence of a reported value for Oxygen(wt%) that was greater than zero.

Averaged Summertime Parameters

1997 1998 1999 2000 2001 2002 2003 2004 2005

Volume (gal) 12,489,014,209 12,751,858,507 13,069,780,049 13,067,092,143 13,243,677,011 13,853,055,860 13,594,004,836 14,220,295,281 13,573,361,980

Oxygen(Wt%) 2.15 2.13 2.11 2.24 2.21 2.25 2.30 2.55 2.49

API Gravity 58.0 57.9 58.1 58.9 58.5 58.5 58.6 58.2 58.4

Methanol(%Vol) 0.02 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01

MTBE(%Vol) 8.81 8.91 8.60 9.04 9.02 8.95 8.91 7.42 7.02

Ethanol(%Vol) 0.95 1.02 1.07 1.14 1.10 1.30 1.50 3.04 3.03

ETBE(%Vol) 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.01

TAME(%Vol) 0.79 0.79 0.86 0.95 0.90 0.76 0.83 0.42 0.46

T-Butanol(%Vol) 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.02

Sulfur(ppm) 314 204 205 126 127 124 110 80 71

Aromatics(%Vol) 22.7 22.7 22.2 19.3 20.1 20.4 20.1 20.1 20.7

Olefins(%Vol) 12.3 11.0 11.4 10.6 11.8 10.8 11.0 11.4 11.9

Benzene(%Vol) 0.66 0.67 0.71 0.59 0.62 0.59 0.61 0.59 0.66

RVP(psi) 7.63 7.61 7.60 6.78 6.79 6.80 6.83 6.87 6.91

T50(F) 201.9 203.1 201.8 204.7 204.9 204.6 203.7 204.5 201.9

T90(F) 334.6 326.4 331.4 326.6 326.4 327.4 328.3 333.2 329.5

E200 49.5 48.9 49.2 47.6 47.5 47.5 47.9 47.9 48.7

E300 81.9 82.7 82.8 84.7 84.4 84.4 84.4 83.4 84.0

Averaged Wintertime Parameters

1997 1998 1999 2000 2001 2002 2003 2004 2005 

Volume (gal) 14,771,883,555 14,922,645,882 15,167,402,212 15,951,122,397 15,840,926,018 16,435,423,016 16,678,023,167 17,209,178,629 17,358,792,676

Oxygen(Wt%) 2.20 2.22 2.16 2.12 2.11 2.09 2.14 2.38 2.37

API Gravity 62.5 62.0 62.0 62.4 62.2 62.2 62.1 62.0 61.9

Methanol(%Vol) 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01

MTBE(%Vol) 8.74 8.94 8.47 8.21 8.27 8.01 7.76 7.03 6.63

Ethanol(%Vol) 1.10 1.16 1.18 1.22 1.18 1.31 1.68 2.68 2.86

ETBE(%Vol) 0.00 0.00 0.00 0.00 0.02 0.01 0.00 0.00 0.03

TAME(%Vol) 0.72 0.71 0.81 0.74 0.72 0.59 0.38 0.33 0.29

T-Butanol(%Vol) 0.02 0.02 0.02 0.01 0.02 0.02 0.02 0.02 0.02

Sulfur(ppm) 264 205 214 200 185 184 164 101 81

Aromatics(%Vol) 19.2 19.8 19.6 19.0 19.2 19.4 19.4 19.1 19.5

Olefins(%Vol) 11.5 10.9 11.3 11.8 12.3 11.1 11.0 11.1 11.2

Benzene(%Vol) 0.62 0.65 0.65 0.65 0.64 0.64 0.64 0.63 0.66

RVP(psi) 12.42 12.32 12.25 12.13 12.04 12.09 12.05 12.05 11.89

T50(F) 183.4 181.6 183.6 182.9 184.2 183.4 183.0 181.5 180.7

T90(F) 320.7 319.9 325.2 317.2 317.3 321.3 324.9 325.0 323.5

E200 56.5 56.1 56.0 56.3 55.9 56.0 56.0 56.2 56.3

E300 85.0 85.0 84.7 86.1 85.8 85.6 85.1 85.0 85.3

Reformulated Gas

http://www.epa.gov/otaq/regs/fuels/rfg/properf/rfg-params.htm

Last updated on Tuesday, September 04, 2007

Reformulated Gasoline Parameters by Reporting Year | Reformulated Gas | US EPA Page 1 of 1

http://www.epa.gov/otaq/regs/fuels/rfg/properf/rfg-params.htm 3/29/2011