This is my wife's car. She drives mostly short trips (3 miles each way to and from work) along with shopping runs, etc. We usually drive it on the highway on weekends when going to visit relatives. Probably 70% city driving all told. This is the first oil change after the factory fill. Vehicle miles: 7534, miles on oil: 3670. The oil was in service for 5 months (6/22 to 11/29).
This engine is still fairly new at 7534 miles, so we are not too concerned about any of these readings. The viscosity was pretty low for a used 5w20, but still in the 20W range. Fuel dilution at 2.0% is enough to keep an eye on, but not enough to call a problem yet. Wear looks great, showing no mechanical problems. Universal averages show typical wear from this type of engine after about 5000 miles on the oil. The TBN was mildly low at 2.8, though not to the problem level. Suggest going to 5000 miles on the next oil. Silicon should improve next sample.
I'm thinking 5000 might be too much considering the vehicle's mostly city driving. Maybe 4000 miles tops unless we start taking it on more frequent road trips.
Any thoughts?
BTW, what does "TR" mean for the Water value?
Here is Blackstone's comments:
This engine is still fairly new at 7534 miles, so we are not too concerned about any of these readings. The viscosity was pretty low for a used 5w20, but still in the 20W range. Fuel dilution at 2.0% is enough to keep an eye on, but not enough to call a problem yet. Wear looks great, showing no mechanical problems. Universal averages show typical wear from this type of engine after about 5000 miles on the oil. The TBN was mildly low at 2.8, though not to the problem level. Suggest going to 5000 miles on the next oil. Silicon should improve next sample.
I'm thinking 5000 might be too much considering the vehicle's mostly city driving. Maybe 4000 miles tops unless we start taking it on more frequent road trips.
Any thoughts?
BTW, what does "TR" mean for the Water value?
