Vintage Poulan Chainsaw Fuel Mix (Ratio Chart)

There is no single fuel ratio for every vintage Poulan chainsaw. Find the exact model and its operator’s manual, then mix gasoline and air-cooled two-cycle oil at the ratio it specifies. The chart below converts common ratios; it does not assign one to any model. If you cannot verify the ratio, do not start the saw.

A correct mix helps protect the engine and avoids wasted time diagnosing damage caused by the wrong fuel. It also prevents a common mistake: seeing “50:1” on a modern oil container and assuming it applies to an older saw. The oil label describes a possible mix, not the correct mix for your Poulan.

I treat the model number and manual as the starting point, not the saw’s age, color, or resemblance to another model. Two saws from the same brand can have different instructions. Take a few minutes to identify yours before pouring fuel.

Identify the Poulan model before mixing

A model number is the key to finding the right fuel instruction. Read the identification markings on the saw, then match them to a Poulan operator’s manual or model-specific service information. Do not choose a ratio from appearance, bar length, or a manual for a similar saw.

Look for the model and serial markings on the saw body. Their location can vary, so check the housing and any product label. Record the numbers exactly, including letters and suffixes. Then locate the matching manual through a reliable manual archive, a Poulan support source, or documentation from a qualified parts or service provider.

Use the manual’s fuel section to verify:

• The gasoline grade or octane requirement
• The required gasoline-to-oil ratio
• The required type or specification of two-cycle oil
• Any later manufacturer-approved instruction that applies to that exact model

The manual’s ratio takes priority over a general chart or advice for another saw. If you find conflicting documents, confirm that each one matches the model and, where stated, the production version. Do not resolve a conflict by choosing the ratio with more oil or by following the newest oil-bottle label.

In shop work, a frequent source of confusion is a saw with no readable label and a mix of old manuals or online advice. The practical answer is not to guess. Identify the model through reliable documentation or get help from a service provider who can verify it.

Next step: Write down the model and the ratio shown in its manual before measuring anything.

Vintage Poulan fuel mix ratio chart

This chart converts gasoline-to-oil ratios by volume. It is a measuring aid only: use a row only if the manual for your exact saw specifies that ratio. “16:1,” for example, means 16 parts gasoline to 1 part oil, not 16 fluid ounces of oil per gallon of gasoline.

The 16:1 conversion deserves attention. A US gallon contains 128 fluid ounces; dividing 128 by 16 gives 8 fluid ounces of oil. Adding 16 ounces of oil to one gallon of gasoline makes an 8:1 mixture, not a 16:1 mixture.

Measure gasoline and oil by volume, using a clean measuring container with clear markings. A small error matters more when preparing a small batch, so do not estimate with an unmarked cup or pour by eye. If your manual specifies a ratio not shown here, use that ratio and calculate from the same rule: gasoline volume divided by the ratio number equals oil volume.

For example, if a manual calls for 32:1 and you want to use 2 US gallons of gasoline, the chart’s 4 ounces per gallon means you need 8 ounces of oil. The ratio remains the same whether you prepare a small batch or a larger one.

Key point: The table does not say which ratio your saw needs. The model-specific manual does.

Choose the right gasoline and two-cycle oil

Two-cycle oil is lubricant designed for an engine that uses a gasoline-and-oil mixture. The correct product and gasoline grade depend on the saw’s instructions. Use fresh gasoline and quality air-cooled two-cycle oil that meets the specification named in the manual; do not assume every oil suits every vintage engine.

Read both the manual and oil container. If the manual names an oil standard or type, confirm that the oil you buy meets it. An oil container’s supported ratios do not override the saw manufacturer’s instructions. Do not use straight gasoline in a saw that requires premix, and do not substitute oil intended for a different engine type unless the manual permits it.

Mix in a clean, approved fuel container. Add the measured gasoline and oil, close the container, and mix it as directed by the oil or saw instructions. Label the container with the ratio and date so it cannot be mistaken for straight gasoline or another blend.

If you do not know the required ratio, pause. Extra oil is not a safe way to cover uncertainty. Too little oil can contribute to piston and cylinder damage or seizure. Too much can increase smoke, deposits, and spark-plug fouling. Neither outcome is a substitute for confirming the specification.

Next step: Verify the gasoline grade and oil requirements, then measure the exact ratio from the manual.

Prepare and fuel the saw safely

Safe fueling helps prevent burns and fire while keeping the mix uncontaminated. Prepare fuel away from ignition sources, use an approved container, and refuel outdoors with the engine off and cool. Keep dirt and water out of the fuel, and follow the saw manual for its starting and fueling procedures.

Before mixing, confirm the ratio one last time. Check that the measuring marks are readable and that the container is clean. Once mixed, close and label the container. Do not leave an unlabeled bottle in the shed where someone could mistake it for straight gasoline.

Before starting, inspect the saw’s controls and visible condition. Make sure the chain brake, throttle lockout, chain catcher, and other safety parts are present and working as described in the manual. Check the chain and bar for obvious damage. Use the required protective equipment, including eye and hearing protection, suitable leg protection, gloves, and sturdy footwear.

Start the saw on stable ground using the manufacturer’s procedure. Do not rev a saw to “test” a questionable fuel mix. If it will not start, runs poorly, or has been filled with an unknown blend, stop and check the fuel and manual before continued use. A fuel ratio cannot be confirmed by sound or smoke alone.

A ratio chart does not verify bar fit, carburetor settings, idle speed, or chain specifications. Those details are model-specific too. Do not use a fuel question as a reason to adjust carburetor screws or change other settings without the correct service information.

Key point: Correct fuel is one part of safe operation, not a substitute for inspection or the manual’s starting instructions.

Common mix-up scenarios

These examples show how to apply the chart without assigning a ratio to a particular Poulan model. Each scenario starts with a verified manual instruction. If the instruction is unknown or unclear, stop at identification rather than filling in a likely value.

• The manual says 32:1: Measure 4 US fluid ounces of oil for each US gallon of gasoline. For half a gallon, use 2 ounces.
• A new oil bottle says it supports 50:1: Do not use that ratio unless the saw’s manual or an applicable manufacturer-approved update specifies 50:1.
• A handwritten note says “16 ounces per gallon”: Do not treat that as 16:1. By volume, 16 ounces of oil per gallon of gasoline is an 8:1 mixture. Check the original source and correct instruction.
• The saw has an unreadable label and no matching manual: Do not run it. Seek reliable model identification and documentation before making fuel.
• A can of premix is available: Confirm its ratio, fuel type, and oil specification against the saw’s manual. A convenient package is not proof of compatibility.

These are bench-side decision examples, not case reports about particular Poulan models. I use this approach because the same chart can help with measurement while still leaving the most important question unanswered: which ratio does this exact engine require?

Store mixed fuel and care for the saw

Mixed fuel is gasoline combined with two-cycle oil. Mark its ratio and preparation date, store it in an approved, closed container, and follow the fuel maker’s, saw maker’s, and local rules for storage and disposal. Do not assume a blend remains suitable indefinitely; gasoline quality can change during storage.

Before the next use, check the label rather than relying on memory. If the container is unmarked, contaminated, or its contents are uncertain, do not pour it into the saw. Follow local requirements for disposal instead of tipping fuel onto soil or into a drain.

After use, switch off the saw and let it cool before cleaning or inspection. Follow the manual’s instructions for storing the saw and handling fuel left in its tank. Keep fuel away from heat, sparks, flames, and children. These steps do not change the required ratio, but they reduce the chance of using the wrong or degraded fuel later.

Next step: Store only clearly labeled fuel, and recheck the manual before making a fresh batch.

Frequently asked questions

What fuel mix does a vintage Poulan chainsaw use?
There is no single ratio for all vintage Poulan saws. Use the gasoline-to-oil ratio in the operator’s manual for the exact model.

How much oil goes in one gallon at 16:1?
Use 8 US fluid ounces of oil per 1 US gallon of gasoline. Sixteen ounces per gallon is an 8:1 mixture, not 16:1.

How much oil goes in one gallon at 32:1?
Use 4 US fluid ounces of oil for each US gallon of gasoline, if the manual specifies 32:1.

How much oil goes in one gallon at 40:1?
Use 3.2 US fluid ounces of oil for each US gallon of gasoline, if the manual specifies 40:1.

How much oil goes in one gallon at 50:1?
Use about 2.56 US fluid ounces, commonly rounded to 2.6, for each US gallon of gasoline, if the manual specifies 50:1.

Can I use 50:1 in an older Poulan?
Only if the exact saw’s manual or a manufacturer-approved update specifies 50:1. Do not infer the ratio from a modern oil container.

Can I use extra oil to protect an unknown engine?
No. Too much oil can cause smoke, deposits, and plug fouling, while too little can damage the engine. Verify the required ratio before running the saw.

What if the model number is missing or unreadable?
Do not guess from the saw’s appearance. Seek reliable model identification and matching documentation before preparing fuel.

Does a longer bar mean the saw needs a different fuel ratio?
No fuel ratio should be inferred from bar length. The ratio comes from the engine’s model-specific instructions; bar fit is a separate specification.

Can I use fuel that was mixed for another saw?
Only if its ratio, gasoline, and oil meet this saw’s manual. If you cannot verify what is in the container, do not use it.

(This article was written by one of our staff writers, David Hensley. Visit our Meet the Team page.)