I have used Delo-400, I have used Ursa 10-W30, and now I decided to try Delvac. The car has been burning Delvac really badly, when it never burned any Ursa, or any Delo. Next oil change I am going to use Delo again. Delvac 1300 just isn't up to snuff in my car. I've hard to dump a quart in already, and the next oil change is 200 miles away. Delo will definitely be my next choice.

It is not uncommon when changing oil formulations to notice an increase in oil consumption the first time around.

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Brian Toscano

That is interesting. I changed from DELO 400 to Delvac last year and my oil consumption has gone down slowly ever since.
Made it through the last 1500 miles before I added 1/2 quart. Probably should have left it there anyway.