I just ran Rotella 5w40 synthetic for about 4,800 miles on my 95 BMW 525i with 225,000 miles. Tore the filter apart and found a lot of small carbon like particles in the filter pleats. Much more than previous filter checks. I was surprised and impressed with the cleaning.
I thought the engine would be fairly clean after three Auto r-x treatments and Two Kreen engine cleanings over the past few years. Guess Rotella really cleans.
I thought the engine would be fairly clean after three Auto r-x treatments and Two Kreen engine cleanings over the past few years. Guess Rotella really cleans.