Is the isx king of fuel sipping??

[Texasdude74]

I think the biggest advantage in favor of Cummins is insite. Being able to monitor what's going on with your truck and make changes as you see fit. Look at the MX-13 for example. Their software costs over $4k and just allows you to read and clear codes, you can't change much of anything and it certainly won't walk you through fixing things. The Volvo engines are no better, not user friendly at all. Even the almighty Cat engines have just multi thousand dollar scan tools. Insite is unique.