Used RS6 Engine Oil Analysis | How Healthy Is Your Super Wagon?

🔍 Why Does My Audi RS6 Oil Smell Like Fuel? | Surprising Oil Analysis Results! After chasing down the mystery behind my RS6 C7’s fuel-smelling oil — and replacing everything from injectors to sensors — I finally sent off a sample for professional oil analysis. The results? Not what I expected.
In this video, I break down the full journey:
Symptoms of fuel contamination in engine oil
Common causes in the 4.0 TFSI platform
Parts replaced during troubleshooting
Lab-tested oil analysis results
What it means for long-term engine health

If you own an RS6, RS7, or any Audi with the 4.0 twin-turbo V8, this is a must-watch before your next oil change. Learn what to look out for, how to spot early signs of fuel dilution, and whether it’s time to panic — or just change your driving habits.

00:00 Intro
01:22 Why can oil smell like fuel?
02:30 Getting the RS6 in the air
04:30 Taking the under trays off
07:13 Oil draining bucket (top tip)
08:28 Draining the oil & oil sample
11:25 Oil filter removal
14:20 What oil to use
16:30 Oil replacement
17:44 Oil testing kit
18:52 Results

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