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...

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 …

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 …

Feb 10, 2026 · Member Title: Cummins 600 ISX Turns Over Fine, Won’t Start Members quickly focused on the lift pump as the likely culprit when a 2008 Magna with a Cummins 600 ISX would crank but …

Oct 23, 2016 · I agree with the statement that "Freightliner and Cummins are not on the same page". Per Cummins, a good quality extended life coolant is acceptable for my 6.7L ISB engine.

May 11, 2022 · Fleetguard is Cummins filter brand. Cummins also recommends Valvoline Super Blue full synthetic oil but you can't go wrong with any of the big name diesel oils: Mobil Delvac, Rotella T6, …

Mar 4, 2022 · Luckily, I was covered by the Cummins ext emissions warranty. Both NoX sensors, catalytic convertor and DEF injector replaced early June. All good. Maybe? Last week, 106,000 …

Mar 4, 2026 · Members focused on a 2013 Cummins 8.3 in a Winnebago Journey experiencing consistently limited turbo boost (maxing at 26 psi instead of the usual 32–33 psi), with an oil leak at …

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.

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 …