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So this report might make a few people upset. Reason being is that this oil was in my car for around 3 years. This car is a weekend car if you can even call it that. I think in the last 2 years I've done 500 miles. It stays parked inside at my office and just doesn't get driven much. With that...

I'm coming up to my next oil change on my 2018 Audi S4. I got the first oil change at 7.5K miles as comes free for the first one. I performed UOA on both the FF and sampled the second one without draining at 4.5k miles. I'm settling on 7.5K OCI as I feel comfortable with this. Maybe I will...

Here is my second UOA of my 2018 Audi S4 with 12k miles on the clock. This sample was taken at 4.5k miles and was not changed. My wife drives this car and has a round trip of 22 miles a day. It gets driven probably 90/10 city to highway. She does get on it pretty good as I can hear the d@mn...

Here's another UOA from my 2014 Jeep GC. Vehicle currently has 61,100 miles on it. This is my 4th UOA. I mostly do this to make sure everything is A OK but I also do it as a form of entertainment/ enjoyment . Here's a little more info from my previous ones...

I apologize for the orientation of the sample. If someone wants to correct it that would be super helpful as I don't know how. Here is a factory fill of a 2018 Audi S4 that has the EA839 series 3.0 TFSI V6. This engine runs on the B cycle (similar to Miller Cycle) and requires Audi's (VW's)...

Here is a log of 3 UOA with both PP 5w-20 and 0w-20. The second column should read around 6,391 miles not the misprinted 4,391. Background of this vehicle. Primarily used around town for short trips. Typical day is drive to the gym 2 miles away. Drive 2 miles back to home. Drive 3.5 miles...