Demands on heavy ... diesel engines were set up and calibrated,” Granger explains. This resulted in a lot of fuel soot being formed in the crankcase. “That fuel soot would accumulate in the ...

In the past, there have been similar shifts in preferred engine oil viscosity grades. An example is the transition in heavy duty diesel engine oils in the 1980s from monograde viscosity SAE 30 and ...

HOUSTON (Reuters) - U.S. refiner Delek has the option to run more light, sweet crude oil if it is economical to do so, CEO Avigal Soreq said on Thursday, amid tariff uncertainty threatening supplies ...