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TrusTec® PRF Octane Blend No. 84 is a primary reference fuel with 84% isooctane and 16% n-heptane used in determining octane rating.
Specific gravity at 60/60 °F: 0.6940–0.6960
Isooctane, %: 83.70–84.30
n-Heptane, %: 15.70–16.30
Conor Robertson, Technical Specialist
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TrusTec® PRF Octane Blend 84 is a primary reference fuel with 84% isooctane and 16% n-heptane used in fuel testing to determine octane rating. The reference fluid meets the requirements outlined in ASTM D-2699 and ASTM D-2700.
In order to prevent inaccurate octane measurements, refineries and laboratories require consistent reference fluids during knock engine fuel analysis.
Octane gasoline analysis
Oil refineries
Laboratory testing
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