Yes, it is true diesel
Yes, it is true diesel engines need to be made of steel, not aluminum. As you may know compression causes the fuel to burn and huge amounts of power and heat are produced that steel can control and not warp over time like that aluminum fry pan that no longer lays flat on your stove after being distorted by heat and by the way higher rpm diesel engines wear out faster than low rpm diesel engines that also obtain more mpg. than the higher rpm diesel engines. SO WHAT MAY YOU SAY. Simple, diesel engines have greater torque at lower rpm than gasoline engines at the same rpm and last on average five time longer than gasoline engines. THIS IS WHY ONE HUNDRED PERCENT OF ALL LONG HAUL FREIGHT FOR BOTH TRUCKS AND TRAINS USE DIESEL ENGINES.