And maybe they just changed them again or maybe different plants use different code formats. I just purchased this morning from Lowes a box of the regular Blue DEF. It was still wrapped on a pallet just off the truck so newly arrived. Below is a photo showing the code from two different sides of the box. Both sides have letters also but one code has an extra five numbers. Just going by how we used to be able to decipher the code, I would say this box was in 2021 but going by how recently Lowes got it in, maybe not. Perhaps you no longer need to subtract one from the first two numbers so this box was maybe made in 2022. That would make more sense as there is a shortage of it and DEF is being produced and sold immediately. It does not make sense that a pallet Lowes just got in would have been made 6 months ago. But if I assume 2022 then the next set of numbers would make no sense. So it must be 2021. There have been two different ways to decode the day of the year with Blue DEF. Using the method posted above, the 051 means that this box would have been made on November 11th 2021. The other, older method would have it as Feb 20, 2021. Again seems off as the last box I bought from Lowes about 2 months ago decoded to a manufacture date in Feb 2022. I suppose Lowe's supplier could have reverted back to a batch that is older though. Weird and so convoluted. Why can't they just put the date of manufacture on the box??!!
Does anyone looking at the following photo decode the box to a date other than Nov 11, 2021? And why does one side have the extra "00054" numbers.
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