When I got Kitacamry it had been run with conventional 5w-30...to 97.5k miles...and at most, 10k OCIs...
@ 100k (a 3k conventional OCI) I switched to Pennzoil Platinum (PP) syn 5w-30 until it ran down to "0"...after 5.6k miles
....during that OCI Kitacam seemed to burn more oil on the highway (@75-80mph) than in town...just a bit more, but still noticeably...but still, it went 5.6k on 1 quart....
In this 2nd OCI with PP/K+N filter, oil dropped from 1/8" above the letter "F" to the F-line after 1k primarily local street use...then I took to the highway for a 3.5k mile trip (1400 each way on the highway running a constant 70-80mph for 8-10 hours each day of the 2-day run) and when I got home the dipstick level is surprisingly STILL more than half-way up from "0"
sooo...in this 2nd PP/syn OCI Kitacamry has thus far used less than a half-quart after 4.5k miles....