Why are SisuDiesel's Fortius engines so good?

Engines produced Sisu Diesel are known for being long-lasting and giving a lot of torque and power. The latest series of Fortius engines offers even more. For example, fuel consumption has been reduced by 5-7 percent, noise levels have been reduced, there is 10-20 percent more torque, and the oil drain interval have been increased to 500 hours, which reduces the customer’s maintenance costs by around one-third. How is all this possible?

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