The 6.2L V-8's total output and low end performance are largely the result of the engine's relatively high 11.5 to 1 compression ratio. As a result of this high compression ratio, the engine is required to run on a minimum 91 octane gasoline to avoid detonation/knocking. Chevrolet Silverado and GMC Sierra pickup trucks equipped with the 6.2L V-8 are rated at a maximum 15 city mpg and 21 highway mpg for the 2018 model year; actual EPA estimations will be vary by vehicle configuration and driving conditions.
GM's 6.2L features an active fuel management system commonly referred to industry wide as cylinder deactivation. In order to improve fuel efficiency, the system will deactivate 4 of the 8 cylinders under the appropriate driving conditions. The engine can rapidly transition from 4 and 8 cylinder operation modes.
GM 6.2L EcoTec V-8 Specs
| Engine | General Motors 6.2L EcoTec3 V-8 | |
| RPO Code | L86 | |
| VIN Code | J (8th digit of VIN) | |
| Assembly Plants | Tonawanda Engine Plant, Tanawanda, NY St. Catherines Engine Plant, St. Catherines, Ontario, Canada |
|
| Applications/Production Years | 2014 - current GMC Sierra 1500 2014 - current Chevrolet Silverado 1500 2014 - current GMC Yukon 2014 - current Cadillac Escalade |
|
| Displacement | 376.05 CID (376 CID nominal), 6.16 liters (6.2 liters nominal) | |
| Type | Generation V small block V-8 | |
| Bore | 4.065 in (103.25 mm) | |
| Stroke | 3.622 in (91.99 mm) | |
| Bore/Stroke Ratio | 1.12 (oversquare) | |
| Compression Ratio | 11.5 : 1 | |
| Firing Order | 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3 | |
| Engine Block Material | Cast aluminum | |
| Cylinder Head Material | Cast aluminum | |
| Fuel System | Direct injection, returnless fuel system | |
| Aspiration | Naturally aspirated | |
| Ignition | Coil-near-plug, 8 individual ignition coils | |
| Valvetrain | Overhead valve (OHV), 2 valves per cylinder Standard pushrod V-8 Variable valve timing (VVT) Hydraulic roller lifters |
|
| Engine Oil Capacity | 8.0 qts w/ filter change | |
| Lube Oil Filter P/N | ACDelco UPF63R | |
| Fuel | Premium unleaded fuel, minimum 91 octane | |
| Horsepower | 420 hp @ 5,600 rpm | |
| Torque | 460 lb-ft @ 4,100 rpm | |
| Governed Speed | 6,000 rpm | |
| Emissions Equipment | Catalytic converter, positive crankcase ventilation (PCV) | |
| Engine Dimensions | Length | 29.6 in |
| Width | 25.2 in | |
| Height | 32.2 in | |
GM 6.2L L86 Horsepower and Torque Curves
Source: gmpowertrain.com