Marvel Mystery oil??? to use or not to use in brand new diesel??

Carterfamilyfarm

New member
Joined
Jan 20, 2024
Messages
20
Reaction score
2
Location
Oregon
2024 hd3500 duramax, does anyone have an opinion on putting marvel mystery oil in a brand new diesel to help fuel economy??
i have heard both some say use it right from the beginning some say dont use it on newer diesel engine.
let me know if you have experience with this product please.
thank you
 

For fuel mileage keep your foot out of it..for longevity use fresh fuel and do all the proper maintenance. Mystery oils have nothing to do with it.
 

The L5P will outlast the DPF, many times over, without needing MMO.

I'm a firm believer in MMO in certain instances. The emissions equipped diesel is not one. You don't have to listen to me, cause I don't believe half of the sh!t I say. But you might want to listen to the manufacturer, Valvoline.

I highlighted in sloppy yellow...

Screenshot_20240127_071039_Samsung Internet.webp
 

I don't know what sulfur will do to the high pressure pump, if anything. Or if GM is only required by the epa to say to use only ultra low sulfur diesel, like MMO...

Screenshot_20240127_074331_Samsung Internet.webp
 

The L5P will outlast the DPF, many times over, without needing MMO.

I'm a firm believer in MMO in certain instances. The emissions equipped diesel is not one. You don't have to listen to me, cause I don't believe half of the sh!t I say. But you might want to listen to the manufacturer, Valvoline.

I highlighted in sloppy yellow...

View attachment 6806
thank you!
 

New Posts

Most reactions

Back
Top