Anyone switch form 15w40 to 10w30 in 12.7 Detroit’s?

Friction meaningless ?... C'Mon.

Viscosity is resistance to flow... Pressure

Friction is what wears out the motor.

The two are not hand in hand.

The 10-30 oils have been shown to reduce wear because they flow faster on startup and remove heat quicker during operation.

On a ISX for example, they also get rid of the cam erosion problem caused by lack of flow induced by 15-40 oils.

Etc. Etc.

However, compatibility with a 10-30 or 5-30 depends on the engine... How modern.


OP,
Even your older 12.7 60 series Detroit works VERY well on 10-30 oils......
guaranteed you will see quicker oil pressure in the winter and improved fuel economy across the board from less internal friction compared to 15-40.

Depending on the brand you use, stick with the same brand of you can when you go to the 10-30 oil. It keeps additive packages similar.

 

I just switched to rottella semi syn 10w30 in my 2013 isx ...got about 8500 on it now and hasn't blown up yet lol.

 

It's mineral oil. Required use when breaking in piston engine aircraft, 1st 50 hours.

Hard Facts About Engine Break-In

 

I bet his Dad bought him that car and he’s never paid for tires!!!

 

These guys do all kinds of crazy stuff. Water filled tires, tires made of zip ties. They even tried to do a poor man's posi by JB Welding a car diff solid.

 

I’ll have to check that out!!! I met a Driver a few yrs back w/ Peterbilt 550 K never changed oil used Amsoil some kind of super duper filter what’s up with that? Alien technology ?

 

I think it was west coast filter

 

I appreciate the thoughts posted so far. Some of you has educated me very well.

I am not the easiest person to go over a situation in trucking like oils because I am set in my ways. But even a old dog can learn new tricks.

 

Stick with what you know works and don't worry about the new tricks.