It's hard to say, but I think you're wrong.

He always used to say, 'It's easy to say, but hard to do.'

He is good at expressing his feelings well.

I often use vegetable oil for cooking.

Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.

This dish uses olive oil, which has been used since ancient times.

I use hempseed oil for salad dressing.

I always add chili oil to my ramen.

Nectarine is one of my favorite fruits.

I cook using cooking oil.