You're going to be fine with 5w40 the thinner oil is for fuel economy but heavier oil will make your car last longer so that's the tradeoff.... If you are in a warmer climate then a lower starting weight would matter but I'm in Canada and I'll be running 5w40 liqui moly all year every year.
Also will help with oil consumption.
Been using Liqui-Moly 4200 5w30 and I don't lose/burn any oil (yet).
I too have a 2013 passat with the CKRA, I’m currently at 175k miles. I do my oil change every 7500 miles. I only use liqui-moly top tech 4200 5w-30. I usually never have to add oil between changes unless a lot of hard driving in the summer.
I have have had very good experience over the decades with Liqui Moly 5-40 and Total Quartz 9000 5-40 Both are excellent motor oils
I use 10W/60 Liqui-Moly with all my engines. I am old school and to a point, thicker is better.
Only vw507 that I can get in my area is motul or liquimoly. I get whichever is on sale.
I’ve been using top tech 4200 for years in my CKRA passat and swear by it. No issues at all currently at 175k miles
Used to go with Mobil 1 ESP for my Passat, but after discovering idParts.com, I now only run Liqui Moly as it was cheaper for me to buy an oil change kit on their website than it was to run to my auto parts store
Liqui Moly is good.
Yamalube is a good oil, nothing special. Get a more premium oil if you care about smoother, stronger performance.
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