diff --git a/info/Hvy-Metal.t b/info/Hvy-Metal.t
index 95ca4392..4be6ba12 100644
--- a/info/Hvy-Metal.t
+++ b/info/Hvy-Metal.t
@@ -23,7 +23,7 @@ guard it carefully.
 Land unit types are heavily customized.  Better check show for the
 details.  Non-mechanized units are slower and more vulnerable,
 infantry units have capability security, marines have amtraks,
-artilley firing ranges differ, few units are light (but troop
+artillery firing ranges differ, few units are light (but troop
 transports and landing ships can carry non-light units), food
 capacities are reduced.
 .s1
@@ -70,6 +70,8 @@ cheaper than usual.
 Food is much harder to grow.  Expect 20% of your population to be
 farmers.
 .s1
+Your refineries make less petrol from each barrel of oil than usual.
+.s1
 Natural resources gold, oil and uran deplete much slower than usual.
 Fully depleting a sector will take you several updates.  Oil
 production does not depend on tech; you don't have to micro-manage to