LTG Maintenence & Lubrication
Engine Oil
Type: 5W-30 Full Synthetic, Dexos Approved
Capacity:
RWD: 4.7 liters / 5.0 quarts
AWD: 5.7 liters / 6.0 quarts
Change Interval: Every 3,000–5,000 miles (4,800–8,000 km)
With Filter: Always replace with oil changes.
💡 Tip for Modified LTG Engines:
If you’re running E85 and/or higher boost levels, many owners have found better protection using 0W-40 or 5W-50 full synthetic oil. This helps combat direct injection (DI) fuel dilution, which can thin the oil under aggressive driving or extended high-load conditions.
Engine Coolant
Type: Dexcool (Orange, GM Vehicle Coolant)
Capacity: 7.6 liters / 8.0 quarts
Key Lubrication & Sealing Points
(Use correct GM part number for your region)
Balance Shaft Bearings, Cam Lobes, Crank Sensor O-ring, Cylinder Bores, Main Bearings, Rod Bearings, Valve Tips, and other moving engine internals:
Lube with 5W-30 (GM US #19293000 / GM Canada #19286321)
Camshaft Cover, Engine Front Cover, Lower Oil Pan, Oil Pan to Bedplate Joint, Engine Block to Bedplate, Timing Chain Tensioner Cover:
Use Sealant (GM US #12378521 / GM Canada #88901148)
Cylinder Head Plugs:
Use Threadlocker (GM US #12345382 / GM Canada #10953489)
Engine Block Threaded Plugs:
Use Sealant (GM US #12346004 / GM Canada #10953480)
Ignition Coils, Oil Level Indicator Tube O-ring, Water Feed Tube O-rings:
Use Lubricant (GM US #19260901 / GM Canada #19260902)
Oil Filter Threads & O-ring Lead-in Chamfers, Fuel Injector O-rings & Tips, Hydraulic Lash Adjusters:
Use 5W-30 engine oil
Oxygen Sensor Threads:
Use Anti-seize (GM US #88862477 / GM Canada #88862478)
Thread Repair Cutting Oil:
GM US #1052864 / GM Canada #992881
Thread Repair Cleaner:
GM US #88862650 / GM Canada #88901247
Valves (Cleaning):
Use Parts Immersion Solvent (GM US #12345368 / GM Canada #10953514)
Tip: Keep a small bottle of 5W-30 and a tube of GM-approved sealant in your garage. Many minor repairs and parts swaps on the LTG engine require one of these.
