My old filter from my old z and the other from the filter of my new z. I did buy the Selin when they first came out. The shop did the whole engine overhaul. I'm pretty sure they know how to oil the filters since they specialize in z cars for 30 years. He didn't say selin was bad. Just one more thing to worry about . I was the first in toronto to show up at the shop with the Selin kit.. And I think there are other high hp cars running single MaFs affectively.. That's probably why he thinks that