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| Why is that? It’s the same process. There has been no new refinery built in 40+ years. They have upgraded to run heavy. Not the other way around. Heavy crude has more contaminates, sulfur, heavy ends, etc. Requires better metallurgy on equipment, more processing. A Coker unit is a must. I worked in a refinery for 32 years, they spent billions upgrading to run heavy crude, but I never heard of cutting rates 50% to run other crudes. We didn’t run 100% heavy anyway. THE main reason for running heavy Canadian crude was because it was cheap. Refining margins could be negative and we still made money running cheap crude.
Edited by mac4440 3/5/2026 21:53
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Diesel fuel
