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Maxima Racing Oil Hi-Test Octane Booster
Maxima Racing Oil Hi-Test Octane Booster - Detonation Prevention
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Maxima Racing Oil Hi-Test Octane Booster

Part Number: 83916
Online Price: $9.99
Maxima Hi-Test Octane Booster – Safe, Metal-Free Power Additive for 2-Stroke & 4-Stroke Engines
Availability: In Stock.

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Description

Maxima Racing Oil Hi-Test Octane Booster

High-Performance, Metal-Free Octane Enhancer for 2-Stroke & 4-Stroke Engines


Overview:
Maxima Hi-Test is a powerful, concentrated organic octane booster designed to unlock more power and protect high-performance engines from harmful detonation. Compatible with all fuel types—including gasoline, nitro, and alcohol blends—Hi-Test increases the auto-ignition temperature of your air/fuel mixture to suppress pre-ignition and detonation (knock), enabling higher compression ratios and more horsepower.


Formulated without metals, phosphorus, or lead, Hi-Test is legal for all types of competition and won't foul plugs or damage oxygen sensors or catalytic converters. It’s safe for both 2-stroke and 4-stroke engines, and ideal for racing karts, dirt bikes, mini bikes, high-compression small blocks, or any application where increased octane and consistent burn rates are critical.


Key Features:

  • Metal-Free Formula – Safe for all engines, sensors, and racing conditions
  • Increases Octane by Up to 4 Points per Ounce – Customizable dose based on your needs
  • Suppresses Knock & Detonation – Prevents damage to pistons, bearings, spark plugs, and gaskets
  • Enables Higher Compression Ratios – Run more aggressive builds with less risk
  • Improves Combustion Efficiency – Cleaner burn with better throttle response
  • Compatible with Gasoline, Alcohol, and Nitro – Works with all carbureted fuel types



Recommended Usage & Mixing:

  • Use 1–4 oz per gallon depending on base fuel quality and compression ratio.
  • 1 oz per gallon increases octane by approx. 2-4 points.


Ideal For:

  • Racing Karts & Mini Bikes
  • Honda GX200 / Clone / Predator High Compression Builds
  • Vintage 2-Strokes (Air- or Water-Cooled)
  • Performance 4-Stroke Engines
  • Methanol / Ethanol Race Fuels
  • Automotive Engines


Pro Tips:

For Honda Clone engines running over 10.5:1 compression and 24°+ ignition timing, we highly recommend adding Hi-Test to prevent detonation and extend engine life. Running higher octane helps maintain cooler combustion temps and reduce heat-related damage.


Signs You May Be Experiencing Detonation:

  • Blown head gaskets
  • Cracked or discolored cylinder head
  • Melted or damaged pistons
  • Hammer/Failed Rod Bearings
  • Spark plug tip erosion or melting


Other Ways to Reduce Detonation:

  • Use colder heat range spark plugs
  • Reduce ignition timing
  • Lower compression ratio
  • Tune richer: Aim for 12.5:1 A/F ratio under load
  • Use Maxima engine oils for better temperature control


Specifications:

  • Product Type: Octane Booster / Fuel Additive
  • Size: 16oz/473mL - Enough for up to 16 gallons of fuel
  • Application: Premix only – pour directly into fuel
  • Fuel Compatibility: Gasoline, alcohol, nitro blends
  • Engine Compatibility: 2-Stroke & 4-Stroke

FAQ

Q1: What does Maxima Hi-Test actually do?

A: Hi-Test increases the octane rating of your fuel, making it more resistant to knock and detonation. This allows you to run higher compression, more ignition timing, and leaner mixtures safely—resulting in better performance and reliability.


Q2: How much should I use per gallon of gas?

A: Start with 1 oz per gallon, which increases octane by around 2-4 points. For high-compression or poor fuel quality, increase the dose up to 4 oz per gallon. Always tune your engine accordingly.


Q3: Is Hi-Test safe for 2-stroke engines?

A: Yes! It’s 100% compatible with both 2-stroke and 4-stroke engines, and won’t gum up power valves or affect spark plugs when mixed and tuned correctly.


Q4: Will Hi-Test work with methanol or alcohol-based fuels?

A: Absolutely. Hi-Test is designed to mix with gasoline, alcohol, and nitro blends, making it ideal for racing fuels and alternative fuel engines.


Q5: Will this foul oxygen sensors or damage catalytic converters?

A: No. Hi-Test is metal- and phosphorus-free, making it safe for modern emissions equipment and legal for all types of motorsports.


Q6: What are signs of detonation I should look out for?

A: Warning signs include:

  • Pinging/knocking sounds under load
  • Blown head gaskets
  • Melted spark plug tips
  • Piston damage or erosion
  • Cracked cylinder heads

If you see any of these, increasing your fuel’s octane with Hi-Test can help prevent further damage.

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