Oil Weight Question?

[stagger_lee]

This is a dumb question, but I have never got a straight answer. I just did my first oil change this weekend. Used Mobil 1 5W -30. I read in the manual the H3s require 5W 30 only. What are the pros and cons of using a heavier weight? Why do they say to only use that specific weight oil? Thanks all!

[graydog]

Originally Posted by fagger_lee

This is a dumb question, but I have never got a straight answer. I just did my first oil change this weekend. Used Mobil 1 5W -30. I read in the manual the H3s require 5W 30 only. What are the pros and cons of using a heavier weight? Why do they say to only use that specific weight oil? Thanks all!

You are correct, that is a dumb question.

[DRTYFN]

Learn to use the SEARCH feature. And pay attention to F5's advice.
http://www.elcovaforums.com/forums/s...ight=oil+5w-30

[stagger_lee]

Originally Posted by DRTYFN

Learn to use the SEARCH feature. And pay attention to F5's advice.
http://www.elcovaforums.com/forums/s...ight=oil+5w-30

Yeah I did SEARCH and read all that, I understand differences between Synthetic and Non, but question was directed to weight, those differences, pros and cons of heavier weight oil, were not explained. Just curious.

Graydouche

[Desert Dan]

Most new engines are using lower viscosity multi weight oils like 5-30wt.

I am not sure why? That would be an F5 question
Maybe higher tolerances require thinner oils or the 5-30wt lubricates better?

What about in extreame heat 110 degrees plus is the 5-30 good enough?

[stagger_lee]

My exact questions, when to use heavier weight and why?

[Vettster]

Originally Posted by Desert Dan

Most new engines are using lower viscosity multi weight oils like 5-30wt.

I am not sure why? That would be an F5 question
Maybe higher tolerances require thinner oils or the 5-30wt lubricates better?

What about in extreame heat 110 degrees plus is the 5-30 good enough?

Part of the reason is for fuel savings.
Living where I do, I always use heavier oil.
Mobil 1, 15-40 or so.