⚠️ CAMBI MARCIA SOTTO I 2.000 GIRI? Stai TRITANDO il Motore (E Come Salvarlo a Costo Zero) ⚙️🚗

Summary

The speaker argues that following a car’s shift-up indicator or using Eco mode at very low engine speeds may slightly reduce fuel consumption, but could put extra strain on some engines and drivetrains—especially when accelerating, climbing, or carrying a load. He says these recommendations are shaped partly by emissions-homologation targets rather than long-term mechanical durability.

The specific cost and wear estimates are the speaker’s analysis and are not independently verified findings.

Mechanical issues described

• Bearings and oil film: At low RPM under high load, the speaker says the crankshaft may turn too slowly to maintain a robust hydrodynamic oil film while combustion pressure on the bearings remains high. He argues this could accelerate bearing wear, particularly with low-viscosity oils and oil pumps operating at reduced output.
• Torsional vibration: Lugging—demanding acceleration in a high gear at low RPM—can produce strong engine torque pulses. The speaker says these may overwork a dual-mass flywheel, potentially damaging its springs and grease, and may also stress the timing chain and tensioner.
• Combustion and emissions hardware: He claims that poor airflow and combustion at low RPM under load can increase soot in diesel engines, contributing to deposits in the EGR system, intake, turbocharger, and particulate filter. For small turbocharged petrol engines, he warns of low-speed pre-ignition under heavy throttle.
• Automatic transmissions: The speaker distinguishes full hybrids, whose electric motors can assist at low engine speeds, from conventional and mild-hybrid cars. He says some automatic transmissions use clutch or torque-converter slip to smooth low-RPM operation, which may add heat and wear.

Driving guidance offered

1. Use the shift indicator selectively. The speaker says it is most appropriate on level roads at a steady speed. Under acceleration, on hills, or with a heavy load, he recommends shifting later—roughly 1,800–2,100 RPM for diesels and 2,000–3,000 RPM for petrol or LPG engines, depending on the vehicle.
2. Downshift before demanding power. Rather than pressing hard on the accelerator in a high gear, downshift one or two gears before overtaking or climbing a ramp.
3. Limit Eco mode to suitable conditions. For hilly or mixed urban driving, he recommends Normal or Sport mode, or using paddle shifters or manual selection to avoid lugging. He considers Eco mode more suitable for steady-speed cruising.

The speaker also disputes the idea that using a slightly higher RPM necessarily increases fuel consumption. He says that selecting a lower gear can let the engine deliver the same road power with less throttle while reducing mechanical strain.

Main speaker/source

A single presenter, identified in the video as the host of an engineering-focused automotive channel. No other speakers are featured.