Join Date: Apr 2006
Location: Sand Gap, KY
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This is a dumb question but I know Cummins recommends 15w-40 for higher than 0 degrees and 5w-40 for all around temps and over 0 degrees -
I have a few gallons of 5w-40 T6 on my shelf, we rarely get down to 0 degrees here in NC, I think I'm just going to use it as opposed to going and buying 3 more gallons of 15w-40?
5W40 and 15W40 are both 40 weight at operating temperature.......
I’ve ran 5W40 year round in my previous 2014 3500 and my current 2018 4500.
2018 RAM 4500 Chassis Tradesman Crew Cab 60” C/A 4WD, 6.7L Cummins, AISIN AS69RC Transmission, 4.10 Axle Ratio, Chrome Appearance Group, Keyless Entry, Fog Lamps, Chrome Tubular Steps, 52+22 gallon fuel tanks, 5.0 Radio, Single Disc CD Player, 225/70R19.5 Continental HDR’s, Aluminum Wheels, Parkview Backup Camera, Trailer Brake Controller. Equipped with a CM SK Series flatbed w/B&W Turnover Ball. Purchased new April 23, 2018. Currently : 176,194 miles and 3,098 hours as of October 26th, 2019 (Average Miles Per Hour = 56.9)