1 teaspoon is 5 ml. So 3 litre is 600 teaspoons.
The weight of 1 litre of cooking oil is approximately 0.92 kg. So, 20 litres of cooking oil would be roughly 18.4 kg (20 x 0.92).
There are many quality levels of edible oil. One of the cheapest is Canola oil and here in Canada this is about $3 per litre. - Extra Virgin Olive oil is about $15 per litre. There are many in between.
20 litre
Oil tankers vary in size by a huge margin, from a few thousand tonnes DWT to 500,000 tonnes DWT. The density of crude oil also varies, averaging around 0.7 kgs per litre. There are 159 ltrs (apprx) per barrel. From this you can calculate how much each type can carry.
The energy content of oil can vary, but on average, a litre of oil contains about 35-40 million joules of energy. This energy can be released through combustion to generate heat or power.
6.5 litre with filter though some report 8.3 litre Filter RZ372 and 6.5 litre of oil 15W40.
5 and half litre of oil without changing the oil filter 6 litre with oil filter
The density of cooking oil ranges from 910 to 930 kilograms per cubic meter or 0.91 to 0.93 grams per cubic centimeter . So 1 litre of cooking oil weighs 910 to 930 grams or 0.91 to 0.93 kilograms.
1/2 gallon therebouths
1.25 litre
3.2 litres in a 1.3 litre