Fuel Additive Dose Calculator

Work out fuel additive dose instantly with clear inputs, formula shown and shareable results.

About Fuel Additive Dose Calculator

Fuel additives are specified as a treat ratio — 1 part additive to 2000 parts fuel is a typical detergent or cold flow dose. Dividing fuel volume by the ratio gives the additive quantity, and the cost per litre of treated fuel is the figure to weigh against the benefit claimed.

Formula

Additive dose

Additive volume = fuel volume / treat ratio; cost per litre of fuel = additive cost / fuel volume

Worked example

With the default values below, Fuel Additive Dose Calculator returns Additive Required of 15.0000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Fuel Volume To Treatminimum 0 L: 30,000 L
Treat Ratiominimum 1 : 1: 2,000 : 1
Additive Costminimum 0 per L: 950 per L
Additive Pack Sizeminimum 0.01 L: 20 L

Results

Additive Required: 15.0000
Packs To Open: 1
Additive Cost: $14,250.00
Additive Cost Per Litre Of Fuel: $0.47500

Step by step

1Values used
2Additive dose
3Additive Required= 15.0000
4Packs To Open= 1
5Additive Cost= 14,250.00
6Additive Cost Per Litre Of Fuel= 0.47500

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 5 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Can the dose be increased for better effect?

Rarely. Overdosing detergents can cause deposits and injector fouling, and overdosing cold flow improvers gives no further depression of the pour point. Follow the supplier's specification.

When must additive be added?

Cold flow improvers must be dosed above the fuel's cloud point with good mixing, before any wax has formed. Adding them to already-clouded fuel does not work.