Originally Posted By: Dak27
Thanks for the additional info, Doug. I really appreciate your knowledge and expertise.
I was concerned these new formulations might not offer as good as protection for my truck's engine, which is a factory remanufactured 1998 Detroit Series 60, -until I read the links you provided. Thanks again.
As far as switching over to a 5W40 for me remains to be seen. I know there is a real long term benefit to semi-synthetics and full synthetics, but at this early time in my Single Truck business, as a cost measure, and to keep within my engine's warranty, my plan is to use Mobil Delvac 1300 conventional 15W40 and go with 15,000 mile OCIs and UOAs.
I certainly won't rule them out in the future, though.
Best Regards, -Dak
Back when CJ-4 oil came along, it didn't look as impressive as CI-4+ (on paper) but the oil companies all said that it would outperform the older formulations in protection and still protect the exhaust emission systems. It sure seems to have been the case.
Based on that, Volvo has recently (earlier this year) bumped up their OCI limits by 10K miles on newer trucks. They have also found that as the exhaust filters come in for cleaning, they are in pretty good shape and extended the cleaning cycle out to 400K miles (up from 250K).
Based on the last several years of success running CJ-4, I'm not afraid of what's coming in the HDEO market.