NHTSA Expands GM L87 Probe as 0W-40 Remedy Faces a Tighter Base-Oil Market
August 25, 2026
NHTSA has expanded its investigation of GM’s 6.2-liter L87 V8 to nearly 1 million vehicles as post-remedy engine failures raise new questions about the 2025 recall. The probe comes as the dexos R SAE 0W-40 market faces higher premium base-oil costs and tighter supply conditions.