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Person had a severe sludge problem; ran auto-rx but not much obvious improvement. UOA prior to the treatment yielded no antifreeze or water.
If I'm not mistaken, the person used OEM filters and BMW 5W30 (GrpIII syn) for the clean/rinse phases.
The person has more RX and plans to retry. I told them that they should try using a mineral 15W40 this time to rule out any reaction that may have occured with syn oil and RX.
Frank?
Person had a severe sludge problem; ran auto-rx but not much obvious improvement. UOA prior to the treatment yielded no antifreeze or water.
If I'm not mistaken, the person used OEM filters and BMW 5W30 (GrpIII syn) for the clean/rinse phases.
The person has more RX and plans to retry. I told them that they should try using a mineral 15W40 this time to rule out any reaction that may have occured with syn oil and RX.
Frank?