This happen coz everytime there left over oil, mechanic keeps them.
If one car leftover 300ml, they will only need another 12 cars to to get a total of 4litre.

The 14th car will just use all the accumulated leftover oils, that particular bottle? Just connect back to your story above.

Those are not the leftover.
The leftover is the unlucky one, perhaps the 14th car?

BMW and Mercedes usually use metering valve to measure the capacity required for each car, hardly any leftover, even if there is, no bottle to store them up.

To me, 0w20 by Honda is "cheap" oil. Proper branded 0w20 cost more than RM250 for 4litres.
Honda must be using cheap base oil to blend them, and cheap additives.

My customer uses Fosser 5w40 in his Accord 2013 and he told me, pickup/acceleration/engine quietness improve much more than using Honda 0w20.

Its not just the viscosity but also the group based oil being used, the additives package.

This post has been edited by allenultra: Jun 6 2016, 04:22 PM