Feb 20, 2026 · Members with the Cummins 6.7 ISB engine on Freightliner chassis report confusion over oil capacity, as the manual often lists 12 quarts, but the dipstick reads low even after filling to that …

Sep 5, 2022 · I’m looking to buy an ISL 8.8 or 8.9 engine with the common rail fuel system and without the DEF system. What are the best and worst years to buy? Also, any...

Jun 22, 2025 · The **Cummins ISL 425 HP** (often the ISL9 or ISL 8.9L, depending on year) is generally a **strong, reliable engine**, but like any heavy-duty diesel, it has some known issues …

Jan 27, 2026 · The Cummins® Turbo Diesel engine is equipped with several features designed to assist cold weather starting and operation: The engine block heater is a resistance heater installed in the …

Feb 14, 2026 · Members with extensive experience on the 5.9 Cummins engine generally agree that valve adjustments are rarely needed before 100,000 miles, especially if the engine is running …

Jun 23, 2025 · I have a 2025 RAM 2500 with the 6.7L Cummins engine and I want to make sure I use the right motor oil and I've always used Shell Rotella. I looked in the owner's manual and searched …

Nov 8, 2018 · It wasn't till the 2019 Cummins (new CGI block) you started hearing about engine failures. What “engine failures” are you hearing/posting about? I have had my ‘24 Ram 2500 w/6.7 CTD six …

Nov 1, 2013 · 18CrewDually Senior Member Joined Nov 17, 2019 Posts 2,421 Reaction score 3,411 Location U.S.- New Jersey Ram Year 2018 Engine Cummins 6.7 H.O.

Nov 4, 2025 · Members are seeking ways to increase the power of a Cummins ISB 6.7 (300hp) engine for better hill performance while towing a stacker trailer, with a focus on remaining legal in California. …

Apr 21, 2024 · I have a 2021 Tiffin Bus going on its 5th DEF sensor replacement, this is getting to be very annoying, the last one was replaced just 2000 miles ago in December with what I believe to be …