Cummins N14 fuel mileage

1532238

{"text":"My truck is averaging 5.2 mpg which seems low to me.    \n\nI usually stay under the speed limit.  Maybe average 68 and pop it up to pass slow governed trucks or cars when necessary.  Most of my loads don’t max my weight out so am I just expecting too much from my truck or do I need to be checking some things and if so, what do I check? ","videos":"[]","link":"{}","pics":"[]","canComment":false,"externalShare":false}

1523037

{"replyTo":"","text":"I wish I could get 5.2 lol but i built mine for fun ","replyToPid":0}

1532238

{"replyTo":"

1024394 发表于 2022-06-07 20:28:54 Depends on the gearing as well. Our 99 KW T800 has a 500hp N14, 13 speed with 4:11 gears.  62mph is 1550rpm, pulling 102500lb tridems.  It will go faster but it originally was spec'd for this.  Now it is a high rise sleeper and we pull reefers so it is more aerodynamic than your shaker.  I shift at 1700rpm and run Canadian 2 lane mountain roads.  I get the same fuel mileage as you, better on flat ground.  May want to try a week or at least a couple days running 62.  Yes it can be tough when it seems like you are going backwards down the road but fuel savings, tire wear etc affect your wallet.  Rather see you keep a few more bucks.

","text":"I’m going to start earlier in the morning this week and try to avoid that evening traffic.  I don’t mind running slower until the cars come out and start cutting me off. It’s also cooler at night when I have to make those drop and hooks.  \n\nThank you.   \n\n","replyToPid":463634}

1024394

{"replyTo":"","text":"Depends on the gearing as well. Our 99 KW T800 has a 500hp N14, 13 speed with 4:11 gears.  62mph is 1550rpm, pulling 102500lb tridems.  It will go faster but it originally was spec'd for this.  Now it is a high rise sleeper and we pull reefers so it is more aerodynamic than your shaker.  I shift at 1700rpm and run Canadian 2 lane mountain roads.  I get the same fuel mileage as you, better on flat ground.  May want to try a week or at least a couple days running 62.  Yes it can be tough when it seems like you are going backwards down the road but fuel savings, tire wear etc affect your wallet.  Rather see you keep a few more bucks.","replyToPid":0}

1026402

{"replyTo":"","text":"try different techniques to confirm also like drive on cruise control and on 60mph also switch of your engine when ever you stop and see the difference","replyToPid":0}

137588

{"replyTo":"","text":"get an over head valve  adjustment  it's about 200 bucks I was getting  4 to 5 had that done and jumped  to 6 and 7bsome times 8","replyToPid":0}

766797

{"replyTo":"","text":"all depends on the gears if you slow down to 62 keep rpm in 1600 no cruise if not on flat and no winds feet the fuel before hills let it go just before top run tires pressure 115 use Pittsburgh Power Max milage no idling you gain 1 mile... I did 5.8 on all mechanical CAT ...","replyToPid":0}

1024394

{"replyToPid":463657,"replyTo":"

1532238 发表于 2022-06-08 18:08:21 This comment has been deleted

","text":"Fun = big power lol  nothing better than being fully loaded and chasing cars up steep grades or having them try to pull out and pass and they just can't do it 🤣"}

674413

{"replyTo":"","text":"Nope that’s good for that motor hard to get fuel milage out of them ","replyToPid":0}

1252099

{"replyTo":"","text":"I doubt that you’ll get anything better, seems good 👍 ","replyToPid":0}