Arnold 2-Stroke Mixing Bottle
A graduated petrol/oil mixing bottle for 2-stroke brushcutters, letting you measure accurate fuel ratios by eye at home.
You'll be sent to Amazon in your country. Indicative price — live, localised pricing where available. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cheap way to get mixing ratios right every time
- Translucent body lets you check the level without opening it
- Wide spout makes pouring into a small fuel tank easier
Cons
- Ratio markings can fade or rub off with heavy use
- Cap seal isn't perfectly airtight for long-term storage
What it does
A 2-stroke engine only runs properly on a petrol-and-oil mix, and getting that ratio wrong is one of the most common causes of poor running, smoking or premature engine wear. This bottle takes the guesswork out of the job: the side is marked with graduated lines for the common ratios (25:1, 40:1 and 50:1), so you pour in petrol to the line for your ratio, then top up with 2-stroke oil to the corresponding mark, screw the cap on and give it a shake. It’s a simple, low-cost accessory, but it removes one of the easiest mistakes an owner can make.
Choosing the right ratio
The ratio you need depends entirely on your engine and the oil you’re using — always check your brushcutter’s manual first, since manufacturers such as Stihl and Husqvarna often specify their own figure (commonly 50:1 with a fully synthetic oil). Cheaper mineral oils sometimes call for a richer 25:1 or 40:1 mix. If you run multiple machines with different requirements, having a bottle with several ratio lines marked saves you doing separate calculations for each one. A 1 L bottle is enough for most small trimmer tanks and easy to store in a shed or garage without taking up much room.
Honest limitations
This is a basic plastic bottle, not a precision instrument — the moulded ratio lines are a helpful guide rather than laboratory-accurate, and repeated use in sunlight or with solvents can make the printed markings harder to read over time. The cap threads are functional but not designed for long-term fuel storage, so it’s best used to mix fuel you’ll use within a few weeks rather than as a permanent storage container. It also doesn’t measure oil separately with fine graduations, so if you want more precise small-batch mixing (for example topping up a nearly-empty tank) a separate oil measuring cup alongside this bottle is worth having.