Opinions on Eneos 0w-50

[s13loverdrift1]

I would like to hear what your opinions are on eneos 0w-50. I've seen three videos on dynos with it increasing the horsepower. Is that just marketing? Or are they legit? Also how do you think the protection would be like? If 0w-40 is good for the engine would this be better? Thanks
Also the your opinions and what you run would be great to know I've looked at the old thread about this and this oil was never mentioned.

[Carl H]

ENEOS is awesome oil, but 0w50 is to effin heavy for the vh45.
i use 10w30 for daily driving but for hard driving (mountains, high revs, extended power) i use 10w40.
an oil cooler will help keep the thermal loads down as well as keep the oil in its proper viscosity range.

[djwarner]

Remember the engine has a variety of bearings and journals that are lubircated by hot oil. Journals and bearings have difference lubrication modes. BTW engines are designed to operate with oil over 185 degrees F. At this temperature, any water that gets into the oil is vaporized.

The higher number in the SAE multi-grade ratings is the equivalent single weight oil at operating temperature. Vicosity is measured in Centipoise. The standard oil for our Infinitis is 30W, and at 190 degrees it has a viscosity of 11.5. Vicosity for 40W and 50W at the same temperature is 17.2 and 25, respectively. Thus 50W is going to have significantly less flow than the standard 30W.

The theory for using Mobil One 0-40W is not about vicosity, but about the fact that it is a pure synthetic.

A justification for upping the vicosity considers wear on the journal bearing. These bearings rely upon having sufficient pressure drop across the surface to lift rotating part on a film of oil. As bearing wear and clearances increase, the pressure drops allowing metal to metal contact. Increasing the viscosity increases the pressure lifting the rotor. At least that's the theory.

Fact is that if there is sufficient pressure to suspend the rotor, wear is virtually non-existent. So, if you engine is running properly and lubricated properly, you don't need to increase vicosity. If you engine has been abused and already has suffered wear, increasing viscosity may help for a while, but it is not a cure.

[s13loverdrift1]

So is there any true fully synthetic 5w-30s. I saw the new Penzoil Ultra 5w-30 and that looked pretty good. Any opinions on the best brand to use?

[djwarner]

Boy, you'll open up a can of worms with that question.

API specs allow some highly refined products to be called synthetic. Highly refined here simply means that the variety of different molecules is reduced compared to non-synthetic oils having the same viscosity profile.

Some purist think that to be purely synthetic, the oil must be made from non-petroleum stock. As the old Mobil 1 ads used to show, regular motor oil may have molecules that degrade or polimerize (turn to sludge) under heat.

Oil has many tasks to perform in modern engines. Lubrication is just one. Heat conduction is another as well as is absorbing combustion byproducts that make it past the rings. Neutralizing acids and suspending solids are others. Many of these functions are done by additives rather than the oil itself and have nothing to do with where the oil came from.

If you simply want to baby your baby with the best, I'm sure there are lots of readers who will tell you why their oil is the best.

If you want the benefits of synthetic and want to extend the oil change interval, Mobil 1 Extended Performance has a double dose of additives.

[kingkilburn]

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This website is your friend.