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Distance has improved every time. After driving again about 7 km and coming back the improvement was about 1 meter.
Now in the evening droved 60 km and the improvement was 8 meters!.
Measured the total improvement by foot and its 50-60 meters. I did not have clear memory where the best was so far. But its 100% certain that the cars glides much better.
Now the remaining question is has durability went worse... But if you are willing to test new things and dont mind if somenthing brakes I would say try this WS2.
For WD40 when you put the stuff to your engine and transmission test before that how long your car rolls in some test place at slow speeds. After installation drive about 30 miles and repeat the test. If you put it only to your engine the coasting will not improve...
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