The HF corn syrup is not as good anyway. If you want it sweet just use cane sugar. I had a Mexican Coke once and it was so much better.
If you like Mexican Coca-Cola, start looking for soda made for Jewish Passover.
Jewish people can't consume anything with HFCS during Passover, so soda companies do a run of sugar-based drinks around this time of year, every year. The bonus is that it costs the same as "regular" Coke; Mexican soda is oftentimes a lot more.
You may have bought it before without noticing, since in some places, it seems to just replace the regular sweetened stuff for a week or two.
Here is an article about what to look for. We don't generally drink sugared sodas, but have noticed this in the regular grocery store while shopping.
Kosher-for-Passover Coke and Pepsi Are Back!(^) from Serious Eats. If interested, pay attention to to subtle changes in packaging listed inthe article.