Amsoil Date Codes

[ThirdeYe]

I did a quick search of the forums and didn't find it anywhere, does anyone know how to decipher the date codes on the amsoil bottles? I have a couple of gallon jugs and i'd like to see if they're the newer formulation that doesn't tend to thicken in extended oci's. My car likes the thinner oils

 

[ConfederateTyrant]

When did you receive the oil?

Since summer of 2005, the ASL, ATM and TSO were all reformulated to a thinner viscosity. However it took them a while to update the product data sheets online. From what I understand, if you bought the oil after that time, you should have received the new formula.

 

[Pablo]

They are batch codes so it's not easily deciphered. What's the full number set? What oil are we talking about? I can give you an interpolation.

As CT says, chances are if you had ASL, ATM and TSO delivered in the last year+ or so, it's the new stuff. There may be old stuff lurking in stores or some dealer's garage, but the warehouse move so much of those oils, it's not aging there.