Imo Mobil 1 is mid grade at best. Liqui-moly is the only thing I’ve used for the last 5 years, I too started with Mobil 1, then switched to liquimoly (same weight) and the engine was immediately quieter, smoother, and ran cooler.
my 2017 Passat got totaled in a accident this week, was at 205062 miles running strong off Liqui Molygen 5w-40.
I do 3k with Amsoil SS as well. Blackstone analyses of TBN show I could easily do 5,000k.
5000 miles with a quality full synthetic will serve you well for the life of your vehicle.
Take liquimoly for instance, they only have certain oils that meet the VW 508 00 spec but many of their oils are the same weight. None of which will cause your engine to explode if you use them.
Maintenance, that’s what I’m focusing on rn so far ive done oil and coolant, went with amsoil and Nissan blue
I used AMSOIL signature, and do yearly oil changes.
I would take a good look at the brake fluid and stale gasoline but the rest should be fine.
I had been using LM in our Euro vehicles for years until prices started to climb. I switched to the appropriate Mobil 1 oil earlier this year. There is not enough difference in test results to make me stay with LM once the price difference became as big as it was during my last TDI oil change.
Liqui moly apparently it’s not good oil, they’re just good at marketing
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