[JFP in PA]

With having to ask my customers for permission to post their data, we offer UOA service which many customers avail themselves. As the result, we see quite a bit of data over cold weather usage on vehicles, some of which are religiously warmed up before driving, and others that are started and driven off. What I see as interesting concerning article is the claims for massive fuel dilution of the oil on cars that are allowed to warm up vs those that are not and subsequent oil breakdown. From our data, I see no statistically significant differences when comparing the oil analysis data from both segments, either in the level of fuel dilution, or the condition of the oil properties. As such, I have a hard time buying in to the concept that warming your engine is killing your oil by fuel dilution.