Originally Posted By: Snagglefoot
Looks like a definite pattern. The Gen 5's with the larger filter, higer pressure and flow rate oil pump, and larger capacity are recommend to last an extra 1400 miles than the Gen 4's.
This makes me curious - when did the Gen 4’s start getting synthetic blends as the factory fill? If they ever did? My 07 came with conventional, and of course the OLM is calibrated for a conventional lube. 07 was also before Dexos was a thing (no mention of it in my OM anywhere). It doesn’t seem like the OLM algorithm changed much, if at all, when synthetic blends became the norm. For all I know, that might not have happened until Gen 5’s came out. I’ll have to dig through some online owners manuals to find out.