The Mixed Listings

The grade-purity filter answered one question — which pages can be read as a clean 5W-30 competitor. It was never a judgement about whether the seller matters. Lowering the volume gate to fifty added 5 more of these, and the mixed pile now sits at 62,681 units a month against the pure roster’s 62,855 — a 50 / 50 split. Half the shelf sells 5W-30 without selling only 5W-30. Read the pure roster for like-for-like price and position; read this page for who is actually on the shelf.

Same fields as the pure roster, pulled 12 September 2026. A shop marked also pure sells qualified single-grade listings as well — it runs both strategies at once.

Lifetime and shop-wide, not listing-level. Identical field set to the pure roster so the two pages can be read side by side.

Grouped by shop, shops ordered by followers. The grade chips are read from the listing title; the highlighted chip is 5W-30. Price is the figure Shopee displays on the search card, which is the cheapest option on the page and usually not the 5W-30 one — see the per-litre section below.

Counted across all 30 mixed listings. “Volume behind it” sums the monthly sold count of every listing on which that grade appears — the units are not split by grade, because Shopee does not publish a per-option sold count, so read it as exposure rather than sales.

Every one of the 30 carries 5W-30. 21 of them pair it with 5W-40 and 10 with 10W-40, which is the two ends of the Thai petrol range on one page; 12 reach down to 0W-20 for newer Japanese engines.

These four were removed for a different reason and should not be read as mixed listings: they are single-grade pages that fail the product specification itself. They are recorded here so the arithmetic from fifty closes.

Full accounting across both gates: 80 listings screened = 30 pure + 30 mixed + 19 out of spec + 1 still to judge. The four below are the out-of-spec listings from the original fifty; the other fifteen came in with the lower gate and are recorded in Lowering the Gate to 50.