Which oil is best for the 6.7L.
I've always run 15W-40 in all my 5.9Ls year-round.
I am looking over the 6.7L info; it says to run 5W-40.
My summertime temps get close to 100, and Wintertime temps can get down to 0.
Which oil is best?
Which oil is best for the 6.7L.
I've always run 15W-40 in all my 5.9Ls year-round.
I am looking over the 6.7L info; it says to run 5W-40.
My summertime temps get close to 100, and Wintertime temps can get down to 0.
Which oil is best?
My personal opinion - In your region - A PAO synthetic 15W-40 would be a ideal choice. (But I always think outside the box).
Hundreds of UOA have shown/proven - that during hard use the 15W-40 viscosity has produced lower wear #s then 5W-40. (Not much lower - but lower)
Respectfully - any brand of HDEO 5W-40 will work perfectly fine - for your situation (If you don't tow med/heavy loads year round).
To your question though - There is No Best Oil!
You have to run the proper viscosity - according to your driving style/habits & Ambient Temps.
If you tow Med/Heavy 24/7 (Hot Shot) - I would run a 15W-40 (be it Conventional / Syn Blend / Synthetic). --> No Questions.
Otherwise - depending on your Climate / Region of living - Driving Style/Habits - a quality HDEO 5W-40 will work ideally - along with a well thought out OCI. (Don't Skimp on the Oil Filter).
All of this is just my Opinion!
Others will chime in with other advice.
2017 Bighorn (Delmonico Red & Chrome) CC-HD2500-4WD-6.7L-3:42w/Anti-Spin
Oil: -SHELL- Rotella T6 5W-40 & T5 15W-40 combo w/LF16035
68RFE/BW44-46/Power Steering: -Red Line- C+ ATF
Frontend & Rearend: -Red Line- SAE GL-5 75W-90NS
Many Small Mods: Interior & Exterior
Mileage: 28,541
I run 5W-40 in a similar climate.
I don't think I'd run the 15w in 0-degree temps, and 5W-40 covers those warm temps as well.
2017 2500 Laramie: DRD Juiced, 5" TBE, Invisible EGR mod, BD Iron Horn 364sxe/1.0AR, 20x10 Hostile Sprockets, 33x12.50 General Grabber A/T, HID Conversion, Reverse Level 2" Drop CSS Rear Coils
I run 5W-40 in winter, and in spring, I change over to 15-40 for the summer heat 2011 ram 2500 with 111,365 miles.
I have never had any oil or rattling noises problems.
Sent from my iPhone using Tapatalk
I run 5W-40 T6 all year round.
2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon Aux Fuel Tank.
2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.
I run this Valvoline Oil (5W40) with a Fleetguard Stratapour filter.
So far, so good.
I have been happy with this product.
Temps I see are anywhere from 14 - 105 Fahrenheit.
Valvoline Premium Blue Extreme Full Synthetic Engine Oil 5W40 1 Gal - C774038GA (cummins.com)
I run 15W40 full synthetic year round, and my temps get down to 0 or less at times.
2016 Ram Laramie 3500, G56, 6.7, CC, 4x4
2016 RAM 3500 4x4 Laramie Crew Cab ,G56
In the summer or median temps over 50-60 degrees F, I run 15w40 T6.
In the winter I run 5w40 T6 and not only do I see quicker warm-ups but a small bump in MPG averages on longer trips.
Bookmarks