What is the difference between AVGAS 100 and AVGAS 100LL?

Both have the same octane rating (100/130). The key difference is lead content: AVGAS 100 contains up to 1.12 g/L of tetraethyl lead, while AVGAS 100LL contains a maximum of 0.56 g/L — half the lead. AVGAS 100LL is dyed blue; AVGAS 100 is dyed green. 100LL is the current global standard.

What aircraft use AVGAS 100LL?

AVGAS 100LL is used in piston-engine aircraft — including Cessna, Piper, Beechcraft, and most general aviation training aircraft. It is required for engines that need high-octane fuel to prevent detonation (engine knock) during high-power settings.

Where can I buy AVGAS 100LL globally?

SUAT Fuels supplies AVGAS 100LL at airports across Europe, the Americas, Middle East, and Asia-Pacific. Contact our team for availability at specific airfields and competitive bulk pricing.

What are the AVGAS 100LL specifications per ASTM D910?

Per ASTM D910: Motor Octane (lean) min 99.6, Motor Octane (rich) min 130, Reid Vapor Pressure 38.0–49.0 kPa, Lead content max 0.56 g/L, Distillation 10% point max 75°C, End point max 170°C, Freezing point max -58°C, Flash point min -40°C.

AVGAS 100LL — Aviation Gasoline

Name: AVGAS 100LL Aviation Gasoline
Brand: SUAT Fuels
Availability: InStock

The world's most widely used piston-engine aviation fuel. 100 octane, low-lead, blue-dyed — certified to ASTM D910 and DEF STAN 91-090. Global supply for flight schools, private owners, and charter operators.

Request Quote

AVGAS 100LL Specifications

ASTM D910 / DEF STAN 91-090

AVGAS 100LL (Low Lead) is the international standard aviation gasoline for reciprocating piston engines. The "100" refers to the lean-mixture octane rating; "LL" indicates low-lead content at maximum 0.56 g/L of tetraethyl lead. Dyed blue for easy identification at the fuel point.

Property	Value
Octane Number (Motor/Lean)	100 min
Octane Number (Research/Rich)	130 min
Lead Content	max 0.56 g/L
Color	Blue (dyed)
Flash Point	min −40°C (−40°F)
Freezing Point	max −58°C (−72°F)
Reid Vapor Pressure	38.0 – 49.0 kPa
Distillation End Point	max 170°C
Aromatic Content	max 25 % vol
Certification	ASTM D910 / DEF STAN 91-090

General aviation piston aircraft using AVGAS 100LL

100 Octane

Who Uses AVGAS 100LL?

✈️

Flight Schools & Training

Cessna 172, Piper PA-28, Diamond DA40 and all common training aircraft require 100LL for high-performance piston engines.

🏔️

General & Private Aviation

Private owners, recreational pilots, and aero clubs rely on AVGAS 100LL as the global standard fuel at FBOs and airfields worldwide.

🚁

Helicopters & Special Ops

Many piston-engine helicopters and some aerial firefighting aircraft (air tractors, agricultural planes) operate on AVGAS 100LL.

Key Performance Features

Anti-Knock Performance: 100 MON prevents detonation (engine knock) during full-power takeoff and climb in high-compression engines.

Low-Temperature Reliability: Freezing point of −58°C ensures consistent fuel flow at high altitudes and in cold climates.

Storage Stability: Excellent oxidation stability with low gum formation — fuel remains usable during extended storage periods.

Visual Identification: Blue dye ensures easy identification and prevents misfuelling — critical for flight safety at mixed-fuel airports.

Global Standard: Accepted at airfields worldwide. Meets ASTM D910, DEF STAN 91-090 and ICAO Annex 6 requirements.

Controlled Volatility: Reid Vapor Pressure (RVP) of 38–49 kPa ensures reliable engine starting across a wide range of ambient temperatures.

Frequently Asked Questions — AVGAS 100LL

What octane is AVGAS 100LL?

AVGAS 100LL has a Motor Octane Number (MON) of 100 in lean mixture and 130 in rich mixture. The "100" in the name refers to the lean-mixture rating. This high octane prevents engine knock (detonation) during high-power phases of flight.

What is the difference between AVGAS 100 and 100LL?

Both have identical octane ratings (100/130). The key difference is lead content: AVGAS 100 (green) contains up to 1.12 g/L of tetraethyl lead. AVGAS 100LL (blue) contains a maximum of 0.56 g/L — half the lead. 100LL has been the global standard since the 1970s and is the fuel you will find at virtually all general aviation airfields today.

What is the freezing point of AVGAS 100LL?

The maximum freezing point per ASTM D910 is −58°C (−72°F). This makes AVGAS 100LL suitable for flight at high altitudes where ambient temperatures can drop well below −40°C.

What is the flash point of AVGAS 100LL?

AVGAS 100LL has a minimum flash point of −40°C (−40°F). This is significantly lower than Jet A-1 (minimum +38°C), reflecting the high volatility needed for piston-engine starting and operation.

Where can I find global AVGAS 100LL suppliers?

SUAT Fuels supplies AVGAS 100LL across Europe, the Americas, Middle East, and Asia-Pacific. We serve flight schools, FBOs, private operators and charter companies. Contact our team for availability and bulk pricing at specific airfields.

Is AVGAS 100LL the same as 100 octane aviation fuel?

Yes — 100LL and 100 octane aviation fuel refer to the same product (AVGAS 100LL). The "100" is the lean-mixture motor octane rating. It is the only leaded aviation gasoline grade still in widespread use globally and is the primary fuel for piston-engine general aviation aircraft.

Need AVGAS 100LL for Your Fleet?

Competitive pricing, certified quality, reliable supply. Flight schools, private owners, charter operators — we serve them all.

Request a Quote