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I run Fuchs Titan Truck 15w40 in my Cummins 6BT, engine was rebuilt about 50,000ks ago, seems to go alright with this oil
Time to change the oil, anyway, at 3,867 mi. I do 5-6k on the regular, but would use this as an opportunity to change.
I have an 2007 A4 2.0T base. I bought the car with 120k miles on it in 02/19. Yesterday I hit the 224k miles on it. She's my daily driver, over the years I have changed/did the engine oil every 4k miles, car filters all over, wheel alignment, tires, brake pads, rotors, and the battery. Nock on the wood, my baby have been taking car of me. I'm actually surprised that this model is solid af.
I always buy OEM oil from dealer and then get it done at the shop or do it my self sometimes. Just prefer that way cuz I care way too much.
Ive been using 5w40 for 100k miles and my engine is happy as can be. It actually is noticeably smoother with thicker weight
I can whole heartedly recommend Fuchs Silkolene oils, it actually quieted down my sv compared to Motul.
Oil that I used is Fuchs
New Audi do not have the oil sticks to check the oil levels, so they always under pour the engin oil in the car, my q8 is been serviced by Audi and past 2 years I have to top up oil (which is free as car is under warranty) but last month I got pissed and asked them to top it up to max and car runs much smoother and fuel consumption for 1 full tank is 130 km better.
I have a C7 3.0T A6. I put about 2 quarts of oil in it in between oil changes depending on how hard i drive. I don't have a check engine light. The engine doesn't knock, it runs fine.
Had a Q5 and it was a money pit. Oil Consumption got so bad I was putting in a quart every 400 miles.
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If choosing engine oil across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare engine oil across these categories:
In March 2026 on PartReview, engine oil FUCHS were overall better than OEM Audi.
Engine oil FUCHS and OEM Audi were equally popular according to data in March 2026.
By vote balance, engine oil FUCHS surpassed OEM Audi:
By number of reviews, engine oil OEM Audi surpassed FUCHS:
In March 2026, according to PartReview, engine oil FUCHS and OEM Audi have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of engine oil FUCHS with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota.
Also available: comparisons of engine oil OEM Audi with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota.
You can also see who is better among other engine oil manufacturers: Mobil or Castrol, Mobil or LIQUI MOLY, Mobil or MOTUL, Mobil or Shell, LIQUI MOLY or Castrol.