Quick-reference specs, diagnostic guides, tool recommendations, and how-to articles — everything a DIY mechanic needs, organized and searchable.
| Lug nuts (steel wheel) | 80–100 ft-lb |
| Lug nuts (alloy wheel) | 85–110 ft-lb |
| Spark plugs | 15–20 ft-lb |
| Oil drain plug | 20–30 ft-lb |
| Brake caliper bolts | 25–35 ft-lb |
| P0xxx | Powertrain — generic |
| P1xxx | Powertrain — manufacturer |
| B0xxx | Body |
| C0xxx | Chassis |
| U0xxx | Network / Bus |
| 0W-20 | Modern engines, cold climates |
| 5W-30 | Most passenger cars |
| 5W-40 | European engines, turbo |
| 10W-30 | Older engines, warm climates |
| 15W-40 | Diesel, high-mileage |
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Vetted third-party references used by professional mechanics and serious DIYers.