5W-40 oil for everyday driving? | Cummins Diesel Forum
2019 Ram 2500, 6.7 Cummins, towing a 10K fifth wheel in Texas. Cummins recommends 10w-30 above zero, REQUIRES 5W-40 below zero. I had dealer change the oil and use full synthetic. They used …
2021 6.7 10w-30 or 5w-40 - Dodge Cummins Diesel Forum
Jun 7, 2021 · Also, according to Schaeffer's Oil, synthetic blend will hold the additive package longer than pure synthetic. " (The latest product of Valvoline’s 25-year relationship with Cummins, the new …
Using 5W-40 Synthetic oil in Hot Weather | Cummins Diesel Forum
Jun 3, 2019 · I use 5w-40 as well and live here in hot South Carolina with my 2018 Ram. When you crank your engine the 5w oil gets to the parts faster than thicker oil. This is a big plus as you already …
Why is 10w-30w Oil Recommended for temps over ZERO? Why not 5w …
Feb 21, 2023 · The owners guide recommends 10w-30w in above zero temps but WHY exactly when we all know the 5W-40 can also be used in summer and looks like most of you do use 5w-40 year round. …
Engine oil | Cummins Diesel Forum
Aug 13, 2018 · Then the BIG warning Failure to use SAE 5W-40 synthetic engine oil in ambient temperatures below 0°F (-18°C) could result in severe engine damage. Many oils meet these …
2019 2500 6.7 factory oil??? | Cummins Diesel Forum
May 30, 2019 · Failure to use SAE 5W-40 synthetic engine oil in ambient temperatures below 0°F (-18°C) could result in severe engine damage." Also synthetic cost LESS than conventional if you …
Oil thread?? 10w-30 5-40 which better? | Cummins Diesel Forum
Feb 29, 2024 · 5w-40 is better. Plus like gsbrockman said I don't really see 10w-30, maybe my last trip at the parts store, best price I can find is O'Reilly's through their website they always have a …
Factory fill 10w30 or 5w40 info sharing | Cummins Diesel Forum
Mar 2, 2023 · This is not another oil thread about what to use but info I'm sharing after getting back my oil report from Blackstone. No one has been able to answer with proof from cummins or stelantis …
15W40 vs. 5W40 | Cummins Diesel Forum
Jan 26, 2020 · Not wanting to start a war here just looking for input! Most synthetic diesel oils come in the 5W40 viscosity. There aren't as many choices for full synthetic oil in the 15W40 viscosity. Anyone …
15w40 vs 5w40 ? | Cummins Diesel Forum
Feb 26, 2011 · My owners manual says 15w-40 conventional oil, or 5w-40 synthetic. I ran the first 15k miles on conventional, then shifted to 5w-40 Rotella. I run the 5w40 year round, in hot Oklahoma …