Group 1-2-3 , it is really important ??

[Baveux]

I'm asking this because a Shell technical representative said to me that the oil base is important but a lot less important then what some people think.The performance of the oil is the most important thing to consider.

Can you get the same performance from a group 1 if blended properly then with a GR 3 ?

 

[Hammer]

quote:

---

Originally posted by Baveux:
I'm asking this because a Shell technical representative said to me that the oil base is important but a lot less important then what some people think.The performance of the oil is the most important thing to consider.

Can you get the same performance from a group 1 if blended properly then with a GR 3 ?

---

In all honesty, you can probably get superior performance with a group-I with a top notch additive formulation compared to a group-III with a barely passable additive formulation. That is why the real test in whether an oil is good is in the UOA results!

Hammer

 

[Blue99]

quote:

---

Can you get the same performance from a group 1 if blended properly then with a GR 3 ?

---

Short answer is no, by definition, Grp III has better Noack volatility, pourpoint, & less impurities.

The development of Motorcraft 5W-20 by ConocoPhillips for the tough Ford specs is a good example of the importance of VI index in a high performance oil.

But....Group I base oils, particularly in the heavier viscosities, are a workhorse in the lubricant industry. Grp 1's will still be a part of many 10W-30 & 10W-40 formulations for SM/GF-4.