My gf's 2010 CRV has around 90k miles on it. I've been taking it to VIOC the last few years. The car has always had oil changes when the OLM hits 15%. The last few months have been busy and the car was neglected a bit. She went 1,786 miles over the OLM and this is what I found when I checked the oil before heading to Cape May, NJ.
It's times like this where using a synthetic oil is beneficial. Valvoline has never impressed me with their lackluster TBN retention and I'm wondering if this oil started to oxidize. Varnish on the dipstick and burnt oil that does not wipe away. She's getting a new car in a month or so, but I'm not one to neglect a car and let it get to this point. I've also never had this happen with any car I've ever owned or taken care of, however, this is the only time I've used conventional because that's what she usually has put in it. It's possible something else is going on as 1,700 miles over the limit is not much, especially in the Honda 2.4L.
It's times like this where using a synthetic oil is beneficial. Valvoline has never impressed me with their lackluster TBN retention and I'm wondering if this oil started to oxidize. Varnish on the dipstick and burnt oil that does not wipe away. She's getting a new car in a month or so, but I'm not one to neglect a car and let it get to this point. I've also never had this happen with any car I've ever owned or taken care of, however, this is the only time I've used conventional because that's what she usually has put in it. It's possible something else is going on as 1,700 miles over the limit is not much, especially in the Honda 2.4L.