Engine oil Mobil or FUCHS

I've been using Mobil 1 10w30 regular and now High-Mileage Synthetic for decades and most of the Jeeps life.

There’s been a lot of advancements in oils since the YJ was new. I use Mobil 1 0w40 in mine due to its excellent temperature range and proven endurance.

Mobile 1 full synthetic 0W-20 every 5K. My engine hums like a top.

Oil changes are cheap enough now that Mobil1 ESP 0w-30/5w-30 which is Approved by VW as 507 spec is around $28 per jug at Walmart. I'd change it more frequently and not chance it on the 2015 TDI engines in USA.

CKRA Passat, 164k miles, every 10k miles oil changes since new without negative experience. I did a Blackstone report once and oil looked good. I have used Rowe, Liquimoly, Fuchs and Mobil1 ESP.

Mobil 1 is a fantastic oil.

Fuchs Titan GT1 5w30.

I have 265k on my 2002 Weekender purchased new. Run Mobil-1 0W-40. No problems with engine but transmission needs TLC.

I work in the automotive industry; and by far, Liqui Molly, Motul, and Total exceed Mobil 1. Mobil 1 has the recognition and they worked hard at marketing for many years. Independent German studies conclude that they are 3rd place at best when it comes to \"good quality\" oils.

DO NOT use Mobil1 0W40 in the 2.5. I tried it and well before the oil change time, the engine sounded like a diesel with all sorts of valve train rattle.