Oil Catch Can

[dkwilfert]

FYI, I put a catch can on my wife's 08 Yaris some years ago, and at the regular oil changes (5000 mile intervals) it collects 10-15 cc's of oil that would otherwise have gone into the intake and behind the valves to form deposits. No, the car does not burn any noticeable oil between oil changes so there is no excess blowby into the crankcase; I've see similar oil collection rates on other cars I have had with catch cans. On these direct injection engines you can't add fuel system cleaner to get at the deposits on the valves, so PREVENTION is the best cure to maintain a clean system.

[06YarisRS]

Originally Posted by dkwilfert

FYI, I put a catch can on my wife's 08 Yaris some years ago, and at the regular oil changes (5000 mile intervals) it collects 10-15 cc's of oil that would otherwise have gone into the intake and behind the valves to form deposits. No, the car does not burn any noticeable oil between oil changes so there is no excess blowby into the crankcase; I've see similar oil collection rates on other cars I have had with catch cans. On these direct injection engines you can't add fuel system cleaner to get at the deposits on the valves, so PREVENTION is the best cure to maintain a clean system.

Yes, I've read about the GDI engines. My 2016 Kia EX sedan has one. I run fully synthetic oil API SN Plus in both my Rio and turbo Yaris. I worry more about LSPI in my turbo than my Rio. Rethinking this, matthewai, wondered if he should use higher octane fuel. Maybe this is what he was getting at. Maybe it does make sense to run the highest octane fuel available, even though the manufacturer recommends 87.

[matthewai]

Originally Posted by dkwilfert

FYI, I put a catch can on my wife's 08 Yaris some years ago, and at the regular oil changes (5000 mile intervals) it collects 10-15 cc's of oil that would otherwise have gone into the intake and behind the valves to form deposits. No, the car does not burn any noticeable oil between oil changes so there is no excess blowby into the crankcase; I've see similar oil collection rates on other cars I have had with catch cans. On these direct injection engines you can't add fuel system cleaner to get at the deposits on the valves, so PREVENTION is the best cure to maintain a clean system.

yes pretty much which is why im not sure if I should do the crankcase vent breather as well as the catch can or just leave it with the catch can only and thats it