New to catch can

[j91z28d1]

I have no idea what a catch can does. My plugs always looked good when I changed at 50,000 mile intervals. My oil always looked good every 10,000 miles. Maybe I get better mileage with a catch can, maybe spark plugs last to 75,000 miles, which they probably would anyway. I have no clue, and even better, don't care. If I cared I wouldn't be driving a 6,000 pound truck.

10k mile oil changes with active afm?

you sir are brave, or on your 3rd engine lol. year and mileage?

 

[Larryjb]

I actually removed my catch can. It may have been the humidity and temperature where I live, but I was getting so much water every few days to week that it would fill up and actually pull milky water into the valve train. It was trapping more water than oil vapour. Not nice.

So, if you do install a catch can, check it frequently for the first while to see how it does.

 

[intheburbs]

Not much to do with spark plugs... The catch can catches oil mist flowing around in the
intake.. if it's excessive or above average it will coat the intake with engine oil
and then be introduced into the cylinder heads and valve. NO Oil in the intake is the
best, but a tiny bit is OK

The purpose of the catch can is to reduce oil going into the intake, which would otherwise have lead to excess oil in the combustion chamber. Which would have lead to oil-fouled plugs. Eighthtry is saying his plugs have always looked good, i.e. not oil-fouled. Therefore he's saying he doesn't think a catch can is necessary for his truck.

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[Marky Dissod]

I actually removed my catch can.
It may have been the humidity and temperature where I live, but I was getting so much water every few days to week that it would fill up and actually pull milky water into the valve train.
It was trapping more water than oil vapour. Not nice.

So, if you do install a catch can, check it frequently for the first while to see how it does.

Your catch can may have been located in a cool spot where humidity would tend to condense.