looking at buying a newer truck. isx or d13?

The 2007 and 2008 are different motors. Just like the 2010 is a whole different beast with the SCR. The now DPF motors, which applies to you with a 2007 didn't do so well. Things got more advanced when the DPF's came a long, and that caused a jump in MPG's in most cases when things are running right.

 

Unless they have changed something in the last few years it can be turned up.

 

I am running 2010 Volvo 780 D13 with I-shift, average fuel 6.9 mpg with average load 28,000 lbs , driving only for three months but so far no issues running nice ,

 

Volvo mechanic at a dealership said 2008,2009,2010 was a crapshoot, all depends who worked on it for all the upgrades. If you have a dealer, knows what he's doing, okay. Other dealers throw parts and upgrades to fix some of stiff and have no clue, there is your problem.

most of these trucks you see are coming off leases, guess what, they'll don't fix anything it going back to the leasing company, Thay only have too get it to pass there inspection at the leasing provider. Then it's out to the wholesale market. Crapshoot on those years too many up grades.

 

best advice i can give having an ISX i just spent about 6000 in thelast months is buy something with a Detroit motor

 

Both have ups and downs. I have worked on both. The d13 is a more expensive engine to keep up with as mentioned above only Volvo dealers wanna work on them which my opinion is cause they are a p.i.a to work on. Now the isx is much cheaper and user friendly nearly every shop will di isx work. And again in my opinion alone isx is a very good engine of Course every single driver has had driven a truck that's been a sled it happens but if it was my choice id go with the Cummins ISX

 

More to throw in from mechanic point of view all trucks with the CA emission not 1 engine builder or truck builder has yet to work the bugs out again none of them its all still too new. The egr is older and much easier and with that again isx is easiest to work on there main prob is the egr cooler goes bad I work at a shop that we have 95 isx in our fleet and that the main thing we see go bad on isx's and the egr is easy to fix it goes bad can be replaced in 1 1/2 hr

 

I had a 2006 ISX which dropped a valve for no apparent reason at 750,000 miles, then I replaced it with a similar Recon so the dopey NJ mechanics could only screw up hoses and peripheral stuff--not the engine block. But, since I'm a CA OO, I had to get a voucher and dig into my pocket to put an "after burner" DPF on the unit. Since ISX with EGR is so dirty, the filter lasted only six months before I was running into routine back pressure issues. A dust storm in OK settled that problem as I got tangled up with a dozen other trucks, effectively totaling my otherwise beloved 2006 VNL 780. The silver lining in the accident was an opportunity to get a newer CARB compliant truck, so I figured I better go with the very latest engine available, based on the assumption that with more years of beta-testing the engineers might finally get the emissions system problems corrected. I had so many problems with Cummins and frankly their inability to help out in the retrofit system, I decided they needed a rest and bought a Volvo D13. I was persuaded by the Apple versus PC comparison, where Volvo engineers the entire drive train to function together--engine-emissions-transmission package, whereas the conventional Volvo Cummins-Eaton drive train parts collection seems lacking in vision for a new age of trucking. I also think the Cummins engines are overpriced...

 

the engine manufacture is not the problem, it's the emissions is the problem, I have read more stories on the ISX motor on this form to make your head spin.