Question 8270

Is it advisable to use a lubricating oil with such a low viscosity index that it becomes excessively fluid when the engine heats up?

1. 1
   Yes; the more fluid it is, the better it lubricates, and it also carries away residues deposited in the engine.
2. 2
   No, because the oil does not properly lubricate the engine parts.
3. 3
   Only if the engine overheats, since it lubricates better and helps lower its temperature.