Truck is losing oil some where . No oil leaks and truck does not smoke . And the oil engine light did not come on .
How much oil does it use in miles per quart? The catalytic converters reduce visible spike.
I think you meant visible smoke?
^This +1. A quart between oil changes isn’t a big deal for a 9 year old truck. OTOH, if you’re adding a quart a week…
Yes, smoke, I guess my proof reading skills failed, again.