Meanings of heavy sour in English

Much of the stored oil at Cushing is now Canadian heavy sour.

To replenish its heavy sour Venezuelan crude supplies, it has stepped up imports from Mexico, Iraq and Saudi Arabia.

Analysts had mixed opinions whether the first crude down Seaway would be light sweet or heavy sour or a mix.

The smaller plant processes only light-sweet crude, while the big one can handle everything from light sweet to heavy sour.

However, light sweet crude remains fundamentally more valuable than heavy sours, as they can be easily processed and produce higher-quality products.