07/16/2026
If thicker was all that matters, then we would all be using motor honey.
https://www.youtube.com/watch?v=gA6qgeN1SbY
Can good data lead to bad conclusions? Data without context can be misleading, and sometimes the conclusions drawn from perfectly good data are completely wrong.
In this video, we'll examine two hot-button topics in the automotive world: Cylinder Bore Scoring and Using Thicker Viscosity Oil.
Using real-world failure data from Porsche engines, GM's L87 V8, Toyota's recent V6 recall, and SPEEDiagnostix's database of nearly 20,000 used oil analyses, we'll explore what the numbers actually mean—and what they don't.
🔹 What bore scoring is and why it occurs in certain Porsche, BMW, Audi, and Mercedes engines
🔹 Whether thicker oils actually reduce engine wear
🔹 Why some lubrication problems aren't oil problems at all
Most importantly, we'll answer a question that affects every enthusiast, technician, engineer, and oil nerd: Do the numbers tell the truth—or are we sometimes asking the wrong questions?
