74 votes
Oil service has been done every 5K since then using Liqui Moly Molygen Full Synthetic 5W-40 and Hengst filters.
My E550 gets M1 0W40 every 5k, with a new fleece Hengst filter. I don't drive it hard until I see past 80C on the water temp (I don't have an oil temp gauge- only the E63s do). Basically the same procedure I use on my S54 BMWs, and every performance car I've ever owned
I've just experienced this same problem with my 2017 Buick. I have the UFI cap and the dealers used the Hengst filter 7 of the 9 times I had it changed at the dealer. Using a Hengst filter in the UFI cap results in the oil bypassing the oil filter all the time. The UFI cap expects the bypass valve to be on the filter and the Hengst filter just has an open hole there resulting in the car being run for about 50,000 of its 70,000 mile life WITHOUT an oil filter.
I do the oil every 5k on both and use liquid moly 5w40 and a hengst filter.
I use Liqui Moly Leichtlauf and Hengst filters from FCP Euro on my 1.8T Passat. Highly recommend.
I use liqui moly but I have my doubts about whether it actually is *the best* oil. I'm sure it's good, but any oil that meets the spec called out in your owners manual is "good". I place more weight on the filter than anything else. Hengst for me, get that Fram shit outta here.
Liqui Moly Oil change 5W-40 with Hengst Filter
Another Hengst filter?
Since I've owned it, I've performed all the work listed below with genuine VW parts when possible. I've also flushed the oil with Liqui-Moly engine flush, and performed a Seafoam cleaning. Afterwards, oil was changed to Liqui-Moly 5w40 Synthoil Premium and new Hengst oil filter.
I ordered from ECS Tuning - Got 5 qts of Mobil 1 ESP, oil filter, fuel filter, air filter, DSG filter, magnetic oil drain plug for $100 shipped. All Hengst or Mann filters.
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