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What Fuel Octane Does My BluePrint Engine Require?

Using the correct fuel octane is critical for engine performance, drivability, and longevity. Running fuel below the recommended octane level can lead to spark knock, detonation, loss of power, and possible engine damage.

 Small Block Chevy Engines

Pro Series Small Block Chevy Engines

Most BluePrint Pro Series Small Block Chevy engines require:

91+ Octane

Examples include:

  • PS4272CT1 Series
Big Block Chevy Engines

Pro Series Big Block Chevy Engines

Most BluePrint Pro Series Big Block Chevy engines require:

91+ Octane

Examples include:

  • PS502CT Series

Small Block Ford Engines

Pro Series Small Block Ford Engines

Most BluePrint Pro Series Small Block Ford engines require:

91+ Octane

Examples include:

  • PSF4271CT
  • PSF4271RCT

LS Engines

Most BluePrint LS engines require:

91+ Octane Premium Fuel

Always verify your specific engine model specifications.

BluePrint Motorsports Engines

BluePrint Motorsports engines are designed for maximum performance and may require race fuel.

BPMS396CT

Fuel Requirement:

100+ Octane Race Fuel

This engine is intended for extreme-duty performance applications and should not be operated on standard pump gasoline.

Can I Run Higher Octane Fuel?

Yes.

Using fuel with a higher octane rating than required is acceptable.

Examples:

  • Engine requires 91 octane → 93 octane acceptable
  • Engine requires 91 octane → race fuel acceptable

Higher octane fuel will not damage the engine.

Can I Run Lower Octane Fuel?

No.

Using fuel below the minimum recommended octane level can cause:

  • Detonation
  • Spark knock
  • Loss of power
  • Potential engine damage

Always use the minimum octane rating specified for your engine.