Getting a new truck and considering the new DD15 @505 horse or DD16@500. How would you compare reliability, longevity, and fuel economy between the two engines?
Gen 5 DD15 vs DD16
Discussion in 'Flatbed Trucking Forum' started by gator22, Jul 18, 2021.
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Just my opinion, but any Detroit you decide on will be more reliable than anything else on the road.
Out of curiosity, why are you considering the DD16? Heavy haul? If not planning on heavy, maybe even consider a DD13. My '19 Western Star DD13 is rated at 470 and it does better at, or near, gross weights than my old DD15 505 did in the mountains and steeper grades and I get a couple tenths better fuel economy with it. Over 200k without any issues so far.MartinFromBC, FerrissWheel and cke Thank this. -
They now have a 525 hp DD13 gen 5 engine, plus a down speed version.
Interesting side note.
If you take the power curves from the DTNA Connect website and print them out. Then compare my DD16 600/1850 with a DD13 505/1850.
They both have the exact same power curve up to about 15-1600 rpm then the DD16 continues up to the higher rating.
So theoretically they both perform identical under 1500 rpm.
Smaller displacement engines get better fuel economy. The DD16 does have a way stronger jake brake.Ssgtkevin, MartinFromBC, Ruthless and 1 other person Thank this. -
A friend of mine runs a DD13 505/1850 in his truck.Ssgtkevin, MartinFromBC and FerrissWheel Thank this. -
From what I have read the DD15 and DD16 have a B50 life of 1,200,000 vs 1,000,000 for the DD13. That is why I was leaning towards the big bore engines. I run 80-90 gross so the dd13 makes plenty of power. Would I see significant fuel savings with the dd13?
MartinFromBC and FerrissWheel Thank this. -
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I don't baby this thing. I run 5-10 mph faster than I ever have and I still get better fuel economy. If I slowed down to my Cascadia speeds, Fuel economy difference would probably be closer to .6ish mph, but the fuel is gone and I can't say 100%.Last edited: Aug 8, 2021
MartinFromBC and FerrissWheel Thank this. -
I had a near gross load shortly after buying mine. I was undecided about a couple different routes, but decided on doing west bound I-8 in California in to San Diego because I wanted to see how it compared to my DD15 Cascadia. Overall, I think it did better than the DD15 up the long, steep grades. I was really impressed.MartinFromBC and FerrissWheel Thank this. -
MartinFromBC and FerrissWheel Thank this.
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MartinFromBC and FerrissWheel Thank this.
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