Add all the ingredients, except the oils to a bowl and whisk to combine, ensure the sugar and salt have dissolved in to the mixture.
Add the oil and whisk again until everything is well combined.
This mixture will store in a sealed container in the fridge for up to a month.
Be aware that it will thicken and separate when sat in the fridge (this is normal!) so when you want to use it let it sit at room temperatue for 20 minutes or so and give a whisk to bring it all back together.