Looking for opinions from diesel experts!
I've been advised by a good friend that if I was to buy a motor home and had a choice between the International/Navistar MaxxForce 7 or the Cummins 6.7 that it would be wise for me to avoid the Navist...
Forum Discussion
The Navistar in either the 6.0 or 6.4 version were terrible engines for anyone that had a problem with them, kind of like the old GM before Isuzu. Lots of places to find out about the problems of the engines if you look, remember all people have opinions. Issues with the DEF is it is temperature sensitive and deteriorates in temps above 85 degrees.
Cummins attempt without DEF cost them mileage per gallon which has increased with the use of DEF in the newer engines.
Cummins attempt without DEF cost them mileage per gallon which has increased with the use of DEF in the newer engines.
