Try to estimate how much oil you need to use first before cooking. If you are deep frying, use enough to cover the whole surface of your food. If you are just stir frying, use the suitable quantity enough to cook your food without covering your food. There are no estimate or rules to how many times you should use cooking oil. just estimate. if your estimation is too little for the cooking then add till the quantity is right.
edit: The question was asking how many times you should use the same oil for different foods, again and again - not how much oil you need for something. I use oil several times before changing it, but I usually just bake everything.
You should change your oil every 3,000 miles. If you drive your car rough, then you should change it more often.
The average motorist should change the oil every 3000 miles. Oil should be changed more often if driven in dusty condition.
Change the oil filter every time you change the oil.
You should change the oil every 3 months of 3000 miles.
You should change the oil in a Dodge Dakota every 3000 miles.
you should change oil on you car every 5000 miles
You should change the oil every 3000 miles in as 1994 Dodge Van.
If it is the synthetic blend, you should change the oil every 3,000 miles. If it is a full synthetic, you should change the oil every 5,000 miles.
once a year
Every oil change.
I change it every other oil change.
Mineral oil should NEVER be used for cooking. It is a petroleum byproduct, not a food-based cooking oil.