Join Date: Feb 2007
Location: Salt Lake City, UT
Feedback Score: 0 reviews
Oil Change time...T6 still ok in the 7.3?
It's been a while since I've posted. Still have the 01 7.3 in my sig and it's been running great! We only put a couple thousand miles on it per year and I change my oil every 5000 miles. I've been using the Rotella T6 (5-40) synthetic for years and years and it's due again. Last time I changed it was in 2017, almost 5000 miles ago.
I found a note that I wrote myself (about a year ago I think) in my truck that says: "When it's time to change the oil, find out if T6 is still ok after they changed the formulation and rating from CJ-4 to CK-4". I must have been surfing and found the CJ4/CK4 discussions...
So...is the T6 still good to go in my 7.3? I know the CK4 formulation is supposed to be better for the newer trucks to make the emissions cleaner, but to be honest, I really just care about the longetivity of my 7.3 diesel engine.
After an exhaustive search, I've found nothing but speculation and opinion. Would like to hear from you guys.
If the T6 is NOT ok...what is suggested?
Thanks in advance!
2001 F350 Lariat PSD, 4x4, 4DR CC SB, purchased 2/27/07. Ford AIS intake with Fender Sleeve (added 4/2/07), ZooDad mod (7/14/07), Pillar Gauges (ISSPRO) EGT, Trans Temp and Boost (added 3/21/07), Dynomax 4" turbo back exhaust (added 3/9/07), 2 inch leveling kit, 285/70-17 Toyo Open Country II's, Huskyliner floor mats, Rear Airbags, TopDeck Tonneau Cover (added 4/3/07), Excursion "Hush Panels" under the dashboard. Factory Forged Rods, 25 row 6.0 Trans Cooler upgrade, added 8/27/09. Bushwacker Pocket Style Fender Flares and chrome door handles/mirrors (4/2014), DP-Tuner w/60TowHeavy, Decel, 80TowLight, 80Daily, 80DailyMountains and 120hpRace installed 5/15/2014.