The uncertainty around US tariffs could weigh on demand for finished lubricant and base oil, trade body ILMA told Argus.
US President Donald Trump has decreed a 25pc tariff on steel and aluminium imports from Canada, a key import source for these materials used in auto manufacturing. The US sources about 70pc of its aluminium imports and around 23pc of its steel imports from its northern neighbour.
ILMA chief executive Holly Alfano said the White House recognises that the uncertainty surrounding tariffs "creates a challenging business environment".
"A slowdown in auto sales and production due to tariffs could lead to reduced demand for these products," Alfano told Argus. "Manufacturers may postpone investments or expansion plans due to unpredictable costs and market conditions," she said. "If vehicle prices rise due to increased production costs, consumer demand may decline, leading to further reductions in automotive output and associated lubricant consumption."
Automotive vehicle production forecasts have fallen to 15.5mn in 2025 since the tariff announcement, down by 250,000 vehicles from the prior estimate by AutoForecast Solutions. This would put output broadly in line with 2024 , stifling growth in finished lubricant demand. US government data show car sales fell by 5pc in 2024, and finished lubricant sales dropped 6pc over the same period.
Although lubricant sales are not entirely correlated with new car sales, Alfano noted the auto sector is "a significant consumer of finished lubricants".
As it stands the tariffs on steel and aluminium will not now be implemented until 2 April. The White House has said this is to "allow for the flow of parts and sub assembly products into America, to allow American car manufacturers to continue building cars." The US administration is scheduled to host Canadian and Ontario officials today to discuss a possible easing in tariffs.
If these talks yield no progress, and if a month is insufficient for supply chains to be reorganised, the tariffs could stunt automotive manufacturing and in turn lubricants needed for these new vehicles. Ontario premier Doug Ford has cautioned the 25pc tariffs could halt the auto manufacturing industry in as little as 10 days.
While the US is self-sufficient in terms of its Group II base oils, it is a net importer of Group III, with only 4pc nameplate capacity, and both are key to automotive lubricant production. The US is an importer of Canadian Group III base oils from Petro-Canada's 4,000 b/d plant in Mississauga, Ontario.
