Talk:Fifth Anniversary Update/@comment-34790291-20180914111138/@comment-28856025-20180914172208

They could have added an "Uncommon" rarity (colored green) between "Common" and "Rare" and an "Extra Rare" rarity (colored hot pink) between "Rare" and "Legendary". With that, I propose the engine cards below have these new rarities:
 * F6 = Uncommon
 * i5 = Uncommon
 * V8 = Uncommon
 * Four-Stroke = Uncommon
 * i6 = Rare
 * Forced-Induction V8 = Rare
 * V10 = Rare
 * Hot Wheels = Extra Rare
 * Rotary = Extra Rare
 * Serial Racing Engine = Extra Rare
 * High-Grade Engine = Extra Rare
 * V12 = Extra Rare