Ram 2500 NEW 6.7L Cummins Diesel – NOT The BEST Towing Engine!?

Published at : 23 Dec 2025

I Tow with the NEW 2025 Ram 2500 6.7L CUMMINS Diesel and compare it to other diesel engines in the segment when it comes to power, performance, acceleration, fuel economy and overall feel.

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What I Use:
6.4L HEMI
AMSOIL Engine Oil - https://www.amsoil.com/lookup/auto-and-light-truck/2022/ram/2500-pickup/6-4l-8-cyl-engine-code-j-esb-j/?zo=31309211
WIX Engine Oil Filter - https://www.amsoil.com/p/wix-oil-filter-wixoil/?code=57060-EA&_gl=1*1nha42k*_up*MQ..*_ga*MTgxMTYzNzYwNi4xNzQ3MzM4Nzgz*_ga_E8P3KK8JV8*czE3NDczMzg3ODIkbzEkZzEkdDE3NDczMzg4MDUkajAkbDAkaDEwMjA1MDcyMDc.?zo=31309211
WIX Engine Air Filter - https://www.amsoil.com/p/wix-air-filter-wixair/?code=46930-EA&_gl=1*h9vgr7*_up*MQ..*_ga*MjAzNTkzNzEyLjE3NDczMzgyMDA.*_ga_E8P3KK8JV8*czE3NDczMzgxOTkkbzEkZzAkdDE3NDczMzgxOTkkajAkbDAkaDY0ODQzNDY3OA..?zo=31309211
Cabin Air Filter - https://amzn.to/3JMZAHh
Gear Oil - https://www.amsoil.com/p/amsoil-severe-gear-75w-90-100-synthetic-gear-lube-svg/?_gl=1*it5o9x*_up*MQ..*_ga*NDgxNjkwMDUxLjE3NDc0MDExNzQ.*_ga_E8P3KK8JV8*czE3NDc0MDExNzMkbzEkZzEkdDE3NDc0MDExODQkajAkbDAkaDE1NTc0MzUzOTE.?zo=31309211
Grease - https://www.amsoil.com/p/amsoil-100-synthetic-multi-purpose-grease-glc/?code=glccr-ea&_gl=1*hp8cr9*_up*MQ..*_ga*MjAzNjEzODc5Ny4xNzQ3NDAxNDg3*_ga_E8P3KK8JV8*czE3NDc0MDE0ODYkbzEkZzAkdDE3NDc0MDE0ODYkajAkbDAkaDU5NTEyMTc4NA..https://www.amsoil.com/p/amsoil-heavy-duty-metal-protector-amhsc/?code=amhsc-ea&_gl=1*10x1frk*_up*MQ..*_ga*MTkzMjMyOTA3OC4xNzQ3MzM5MTQz*_ga_E8P3KK8JV8*czE3NDczMzkxNDIkbzEkZzAkdDE3NDczMzkxNDIkajAkbDAkaDE4OTQwMDEyNDg.?zo=31309211
Rust protection - https://www.amsoil.com/p/amsoil-heavy-duty-metal-protector-amhsc/?code=amhsc-ea&_gl=1*10x1frk*_up*MQ..*_ga*MTkzMjMyOTA3OC4xNzQ3MzM5MTQz*_ga_E8P3KK8JV8*czE3NDczMzkxNDIkbzEkZzAkdDE3NDczMzkxNDIkajAkbDAkaDE4OTQwMDEyNDg.?zo=31309211

What I Use:
7.3L POWERSTROKE
Engine Oil - https://amzn.to/3ZLIWBD
Engine Oil Filter - https://amzn.to/4gHTwRb
Fuel Filter - https://www.amsoil.com/p/wix-fuel-filters-wixfuel/?code=33817-EA&_gl=1*hx3uv5*_up*MQ..*_ga*MTQxMzc5MjkxMS4xNzQ3NDAxOTA0*_ga_E8P3KK8JV8*czE3NDc0MDE5MDMkbzEkZzAkdDE3NDc0MDE5MDMkajAkbDAkaDMyMzA0OTY2OQ..?zo=31309211
Gear Oil - https://www.amsoil.com/p/amsoil-severe-gear-75w-85-100-synthetic-gear-lube-svl/?code=SVLPK-EA&_gl=1*hka7u4*_up*MQ..*_ga*MTY5MjU2MjE4Ny4xNzQ3NDAxNzM2*_ga_E8P3KK8JV8*czE3NDc0MDE3MzUkbzEkZzAkdDE3NDc0MDE3MzUkajAkbDAkaDI5MTA4ODEwNQ..?zo=31309211
Grease - https://www.amsoil.com/p/amsoil-100-synthetic-multi-purpose-grease-glc/?code=glccr-ea&_gl=1*hp8cr9*_up*MQ..*_ga*MjAzNjEzODc5Ny4xNzQ3NDAxNDg3*_ga_E8P3KK8JV8*czE3NDc0MDE0ODYkbzEkZzAkdDE3NDc0MDE0ODYkajAkbDAkaDU5NTEyMTc4NA..https://www.amsoil.com/p/amsoil-heavy-duty-metal-protector-amhsc/?code=amhsc-ea&_gl=1*10x1frk*_up*MQ..*_ga*MTkzMjMyOTA3OC4xNzQ3MzM5MTQz*_ga_E8P3KK8JV8*czE3NDczMzkxNDIkbzEkZzAkdDE3NDczMzkxNDIkajAkbDAkaDE4OTQwMDEyNDg.?zo=31309211

Towing Gear:
10 ton Pintle hitch (2.5" receiver) - https://amzn.to/3r7Axvm
7 Ton Adjustable hitch (2" receiver) - https://amzn.to/46i2iAf
Adjustable Pintle hitch mount (2.5" receiver) - https://amzn.to/3RqHGS3
15 Ton Pintle hitch - https://amzn.to/45SaCqv
10,000lbs Tie Down Straps - https://amzn.to/3ZBnxeh

In this video, I put the NEW 2025 6.7L Cummins to the test while towing to see how it really performs in the real world. On paper, the updated engine, CP8 fuel pump, and new ZF 8-speed should make this the strongest, smoothest towing setup Ram has ever offered—but the results were a bit more surprising than expected. I break down throttle response, transmission behavior, exhaust temps, grade performance, fuel economy, and how it compares to the 2024 HO Cummins and the Power Stroke. If you tow heavy, this review is for you.

00:00 - Intro
00:46 - Engine Specs
02:25 - WolfBox G900 Sponsor
03:55 - Acceleration Testing
09:31 - Highway Towing
11:46 - Towing Specs
13:02 - Highway Towing Continued