GM’s 6.2L V8 Engine Recall: The Crankshaft Crisis & Why 0W-40 Synthetic Oil Is Now Essential

The Crankshaft Crisis: What Happened with GM’s 6.2L V8 Recall

General Motors recently announced a massive recall affecting over 800,000 trucks and SUVs equipped with the 6.2L V8 (RPO L87) engine. The issue stems from crankshaft and connecting rod defects that can cause catastrophic engine failure — including spun bearings and thrown rods.

GM’s fix? In addition to replacing defective parts, they’ve mandated a permanent oil specification change: every affected 6.2L must now use 0W-40 synthetic oil — not the 0W-20 oil that came from the factory.

Why GM Switched from 0W-20 to 0W-40 Oil

This isn’t just a minor update — it’s a major engineering correction. GM determined that 0W-20 simply didn’t offer enough film strength to protect the crankshaft and bearings under real-world conditions like towing, hauling, or high-temperature operation.

By switching to 0W-40, GM increased the oil’s protective film thickness and high-temperature viscosity, which helps reduce friction and prevent bearing failure — especially when crankshaft tolerances are marginal.

So even though the recall officially targets the 6.2L V8, this update serves as a wake-up call to every Chevy and GMC truck owner running these high-performance engines: oil choice matters more than ever.

What This Means for Your 6.2L V8

Whether you’re towing a trailer, driving through Texas heat, or running your Silverado as a daily workhorse, your 6.2L engine faces significant thermal and mechanical stress.

Here’s what the recall teaches us about oil selection and long-term reliability:

1. Viscosity matters under stress. A thicker 0W-40 oil maintains stable pressure and protection when towing or idling hot.

2. Fuel economy isn’t worth a blown crankshaft. GM’s change proves that ultra-thin oils can’t always keep up with real-world abuse.

3. Not all synthetics are created equal. Premium formulations like AMSOIL Signature Series 0W-40 deliver superior shear stability and deposit control compared to off-the-shelf blends.

4. Heat kills engines faster than miles. The 6.2L’s tight clearances and direct injection system generate extra heat — the right oil keeps it under control.

The Best 0W-40 Oils for Chevy & GMC 6.2L Engines

At AC Oil & Supply, we stock the AMSOIL Signature Series 0W-40 Synthetic Motor Oil — engineered specifically for the kind of high-output V8s found in GM’s lineup.

Here’s why it’s a smart move for your truck:

• Exceeds GM dexos R and dexos 2 requirements

• Provides extra-thick film protection under heavy towing loads

• Prevents sludge and varnish buildup common in direct-injection engines

• Delivers stable oil pressure even after long highway hauls or off-road heat cycles

• Trusted by performance enthusiasts and fleet operators nationwide

Whether you’re running a Silverado 1500, Sierra Denali, Tahoe, or Yukon, upgrading to AMSOIL 0W-40 can extend engine life and keep your truck running smoother for years to come.

View The Data Sheet Here

How to Make the Switch to 0W-40

1. Verify your recall status using your VIN on GM’s recall website.

2. Drain your old 0W-20 oil completely. Do not mix viscosities.

3. Install a fresh AMSOIL EA15K50 or OEM-grade oil filter.

4. Fill with AMSOIL Signature Series 0W-40 Synthetic Motor Oil.

5. Change your oil cap if GM provided a replacement labeled “Use 0W-40 Only.”

If your engine is still under warranty, AMSOIL’s formulations meet or exceed GM’s current specs, so your coverage stays intact.

AC Oil & Supply: Your Texas AMSOIL Dealer for Engine Protection

Based in Belton, Texas, AC Oil & Supply helps Chevrolet and GMC owners get the most out of their trucks with premium AMSOIL synthetic lubricants and personalized service.

We’ll help you choose the best oil for your 6.2L based on your:

• Driving style (towing, commuting, or performance use)

• Local climate and temperature extremes

• Maintenance intervals and oil analysis preferences

You can’t buy AMSOIL directly from our website due to manufacturer policy, but you can:

• Call or text us for a quick recommendation, 512-818-0299, or

• Click Here To Order directly from AMSOIL.com using our Dealer Referral #30482874

Final Word: Don’t Wait for a Recall to Protect Your 6.2L

The GM recall isn’t just about replacing parts — it’s a reminder that oil choice can make or break your engine.

By switching to AMSOIL 0W-40, you’re giving your 6.2L V8 the film strength, heat stability, and long-term protection it deserves — before problems start.

Because at the end of the day, the best repair is the one you never need.