It is wise to utilize professional oil analysis services in order to determine what your oil change intervals should really be. However, at a cost approaching that of a 5 quart oil change, this isn’t always a cost effective solution for passenger car owner.
I often hear companies conversing about the relative pluses and minuses of the more recent API CJ-4 rated oils vs. the CI-4 rated diesel engine oils that came before. As a result, it seems that it would be a good idea for us to clarify a few things about the differences between the two oil types.
It is common to hear individuals talking about the relative positives & negatives of the CJ-4 vs. the older CI-4 diesel motor oils. So, it seems worthwhile to layout the relative similarities and differences between using diesel motor oils that meet each of these respective API classifications.
