Engine oil Castrol or OEM Audi

I put Castrol euro 5w-50 made for BMW and it's 6-7 liters and change it every 5000km I have a 2003 330ci and it still runs like new

5w40 VW 502 spec. Audi recommends Castrol so that's what I use.

Ive been using 5w40 for 100k miles and my engine is happy as can be. It actually is noticeably smoother with thicker weight

Personally i never run ”GM” oil in my 95s anymore. I usually run Castrol edge 0-40

I ran this in my mk7 and my brother ran Castrol Edge Euro in his mk7. I have since sold mine but neither one of us had any type of engine/oil consumption issue and he still has with 130k on it.

Buy filters in bulk from RockAuto. Buy oil Castrol Euro Car from Walmart when it’s in sale.

Castrol. Bought twice from Amazon. Four litres for £19 the first time, £25 the second. Much cheaper than Halfords.

Normally Castrol racing 10w40, it's not expensive and not needed that often

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.

Today I changed my engine oil to castrol power1 Cruise 15w-50 with TVS engine oil additive. Post that my engine starts to vibrate at bit early rpm & getting hot more quickly & frequently.