In gasoline oils they have Signature, XL, and OE oils. That's easy to understand: best, better, and good.
But then they have a separate line for European cars labeled "SAPS', which do not follow the above levels of quality. Are the Euro oils as good as Signature? The pricetag suggests "no" and that they are equivalent to XL in quality, but who knows? (can't be sure)
Next they have diesel oils which seem completely random.
There's "premium", OE, Series 3000, and heavy duty. OE==OE. Obvious. I would guess the premium==XL in quality but once again I don't know for sure. And where does Series 3000 fit in? I suppose it equals "signature" level of quality based on its high price. (And heavy duty? Not a clue where that fits.)
But then they have a separate line for European cars labeled "SAPS', which do not follow the above levels of quality. Are the Euro oils as good as Signature? The pricetag suggests "no" and that they are equivalent to XL in quality, but who knows? (can't be sure)
Next they have diesel oils which seem completely random.
There's "premium", OE, Series 3000, and heavy duty. OE==OE. Obvious. I would guess the premium==XL in quality but once again I don't know for sure. And where does Series 3000 fit in? I suppose it equals "signature" level of quality based on its high price. (And heavy duty? Not a clue where that fits.)