I got some 0w20 syn on sale last year and changed my oil to it in December. 1800 miles and it was low by about 1 quart (down to bottom hole on dipstick). I've noticed the 0w20 really likes to get eaten in my engine. I added a quart of 5w40 to balance it out. I use 5w30 most changes even though it calls for 5w20 for this same reason. I went 6k on the 5w30 and was about half a quart low. This is typical on the 5w30...about half a quart lost every 5-6k. Just seems odd to me my experience is this extreme. Anyone else notice a huge difference like this? I also jump around brands which could be part of it. I'm sure some brands are better at "not losing oil".