Originally Posted By: WANG
The STP filter looks fine, and of very similar construction to OEM. They don't look all crushed when they come out, and seem to fit at least as well as the OEM filter. I'm not going to slap STP stickers in the back window or anything, but they seem to be a suitable substitute. I don't remember how much they cost. I used OEM cartridges for the Mazda3 that we had.
They dont crush. I put mine on Saturday and took it back off to check.
Id bet your fuel is more than 1% from your iron, shear, flash point.