john&bet wrote:
Lynnmor wrote:
john&bet wrote:
My '04.5 Cummins has been on Shell Rotella T-6 for over 160K ago and is changed twice a year. Has not used, smelled or what ever even under heavy towing up to 400 miles a day. Maybe my engine is an oldy but goody.
Yep, Rotella T6 was good oil, but that changed about 10 months ago. Continued use would not be wise.
And exactly how was it changed and why should I change my ways? And what exact damage am I doing to my 13 1/2 year old truck? Please advise.
IMHO not a thing. I would continue to use it and be happy. Cummins has not issued any such warnings about this.