Constant driving at higher engine speeds invariably leads to an increased load on the car and rapid failure of the power unit. To avoid this it is necessary to try to keep low revolutions, which will prolong engine life, providing the best indicators of fuel economy. Let’s talk in detail about what engine speeds should be kept to increase engine life and cash for cars.
Danger of driving at high rpm
It is well known that high revolutions, especially near the red zone of the tachometer will be extremely dangerous for the engine. In such a case, wear of the power unit is noted, engine oil poorly lubricates the moving elements, motor wear and overheating appear, and the lubricant rapidly loses its properties, which further aggravates the condition of the engine.
At the same time it is necessary to remember that several times a month it is still useful to crank the engine up to such high RPM and give it what is called heat. That is to say, to drive at high speed for 5-10 kilometers on a freeway, which will allow removing all sludge and coking inside the engine. It is only necessary to remember about safety during such preventive journeys at high revolutions.
Trips with low revolutions
Often car owners make a common mistake, they try to keep the engine rpm at 2,000 per minute, which, in their opinion, helps to significantly reduce the load on the engine. Indeed, fuel consumption in such a case decreases, but, strangely enough, the load on the power unit only increases.
The fact is that at such low revolutions, improper formation of the fuel mixture is noted, and numerous deposits appear on the cylinders and in the pistons, which do not burn out completely and contaminate the engine. At low engine speeds, problems with oil circulation may be noted, which is due to the peculiarities of crankshaft rotation and low pressure from the oil pump. Therefore, if you want to prolong the life of your car engine, you should not drive at low rpm all the time.
Frequent operation of the car at minimum RPM significantly increases the load on the transmission, as the car owner has to constantly switch gears, respectively, significantly reduces its operating life. Therefore, it is not recommended to keep revolutions in gasoline cars at 2000 rpm all the time. In such a case, it will be necessary to overhaul the engine just by the mileage of 100 thousand kilometers.
What are the optimum engine revolutions
In each specific case, the optimal engine speed will vary, depending on the power of the power unit, the presence or absence of a turbine, fuel type and so on. For example, diesel engines are low-speed, the maximum thrust they have in the range of 2000-2500 revolutions. Whereas a turbocharged petrol engine with a small volume will give the maximal power on the indicators of 3000-3500 rpm.
The majority of experts and auto masters recommend the optimal engine revolutions at 2500-3000 rpm. In this case a significant reduction of engine load, reduced fuel consumption, the car moves in the so-called cruising mode, which especially on the highway reduces the load, prolonging the life of the power unit. It is also necessary when using the car on the highway to activate higher gear, which improves fuel consumption figures, while at the same time providing high-quality engine lubrication and its optimal cooling.
In each case, the indicator of the optimal engine speed will differ, depending on its power, working volume, type of fuel and so on. The car owner on gasoline cars should try to keep the engine in the range of 2,500-3,500 revolutions of the crankshaft per minute, which allows to slightly reduce the load on the engine. By the way, modern automatic transmissions have an advanced control logic, they switch gears in an optimal way, maintaining the engine speed in such a way as to minimize the load on the power unit.