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If there was any doubt that the catch can catches oil, then mine captured just over 3 oz in about 8000 miles of what I would consider to be normal driving. Sure, there were some extended runs at 80 or so, and some WOT passes on 2 lane roads, but I have to admit at being a bit surprised at the amount. The sump on the can was very easy to remove and replace.
Last edited by FatsWaller; 09-10-2018 at 10:06 AM.
Reason: Replace fuzzy pic
If there was any doubt that the catch can catches oil, then mine captured just over 3 oz in about 8000 miles of what I would consider to be normal driving. Sure, there were some extended runs at 80 or so, and some WOT passes on 2 lane roads, but I have to admit at being a bit surprised at the amount. The sump on the can was very easy to remove and replace.
Okay, so 3 fluid oz. is equivalent to 18 tsp. in 8,000 miles, or 1.8 tsp. per 800 miles, or .18 tsp. per 80 miles. Take a 1/4 tsp. (.25) measuring spoon from the kitchen, and imagine a bit less than that (.18) of oil going into your intake system to be burned, spread out over 80 miles.
So 18 drops is being burned per 80 miles. That would be about .22 drops per mile, round that to 1/4 drop of oil per mile, divided into 8 cylinders, so if my math is right we end up with .03 drops per cylinder per mile.
I Do not know the exact amount of oil I am loosing ? But My compliant is that the engine has a rough idle ?? I am also told that the computer logged a bunch of misses ??
The injectors were checked . The wires have been changed and the dealer preformed and engine cleaning . With less the a few hundred miles the intake manifold is all wet with what looks like oil ?? Could this be the cause of my stumble at idle? 2010 LS3
Okay, so 3 fluid oz. is equivalent to 18 tsp. in 8,000 miles, or 1.8 tsp. per 800 miles, or .18 tsp. per 80 miles. Take a 1/4 tsp. (.25) measuring spoon from the kitchen, and imagine a bit less than that (.18) of oil going into your intake system to be burned, spread out over 80 miles.
So 18 drops is being burned per 80 miles. That would be about .22 drops per mile, round that to 1/4 drop of oil per mile, divided into 8 cylinders, so if my math is right we end up with .03 drops per cylinder per mile.
To me, it's 3 oz of oil that didn't condense and pool up in the intake. Whether this matters or not, I can't be sure. I just don't think it's as simple as a bit of oil mist being evenly consumed in each cylinder. The can wasn't expensive, and it's easy to maintain.
To me, it's 3 oz of oil that didn't condense and pool up in the intake. Whether this matters or not, I can't be sure. I just don't think it's as simple as a bit of oil mist being evenly consumed in each cylinder. The can wasn't expensive, and it's easy to maintain.
Until it freezes in the winter and fubars everything.
A catch can is mostly a feel good mod on a street car. You are condensing oil and water that were in vapor state that would simply have passed through and been burned. The amount of oil burned in my car in 5k miles between oil changes is so small that it is imperceptible on the dipstick. Perform your due diligence and choose what you feel is the correct choice. Just be aware of the potential downsides with either choice.
To me, it's 3 oz of oil that didn't condense and pool up in the intake. Whether this matters or not, I can't be sure. I just don't think it's as simple as a bit of oil mist being evenly consumed in each cylinder. The can wasn't expensive, and it's easy to maintain.
To me, it's 3 oz of oil that didn't condense and pool up in the intake. Whether this matters or not, I can't be sure. I just don't think it's as simple as a bit of oil mist being evenly consumed in each cylinder. The can wasn't expensive, and it's easy to maintain.
I agree. If the oil went directly to each cylinder and was consumed , then no big deal. But it can pool in the intake and 'cook' on the valves. My 'mini' can was $50 .... so why not do it?
I agree. If the oil went directly to each cylinder and was consumed , then no big deal. But it can pool in the intake and 'cook' on the valves. My 'mini' can was $50 .... so why not do it?
Apparently GM didn't think it necessary, and there are tens of thousands of LS engines out there running well, many with over 100k miles, that do not have these gadgets.
Okay, so 3 fluid oz. is equivalent to 18 tsp. in 8,000 miles, or 1.8 tsp. per 800 miles, or .18 tsp. per 80 miles. Take a 1/4 tsp. (.25) measuring spoon from the kitchen, and imagine a bit less than that (.18) of oil going into your intake system to be burned, spread out over 80 miles.
So 18 drops is being burned per 80 miles. That would be about .22 drops per mile, round that to 1/4 drop of oil per mile, divided into 8 cylinders, so if my math is right we end up with .03 drops per cylinder per mile.
.....But it does give these millennials and some of the old un-auto educated old farts something to talk smack about when discussing cars......
Apparently GM didn't think it necessary, and there are tens of thousands of LS engines out there running well, many with over 100k miles, that do not have these gadgets.
True enough. But with any manufacturer, 'necessary' is always weighed against cost. It's a 'can't hurt'
mod.
FYI, but you have a dirty side, and clean side to the PVC system, so if you are trying to trap all the oil (isntead of the cylinders burning the oil instead), then you need get a second can on the clean side of the PCV system as well.
Hence the clean side is the port off the valve cover, and which is piped in front of the TB.
The clean side pulls the vapors out of the motor during WOT, and dumped into the intake in front of the TB during WOT instead.
Dirty side is just the intake manifold port and the valley cover port, and which the motor uses when your not at WOT to pull the vapors out of the motor.
As for why it called the dirty side, the motor spends most of it's time with a vacuum on the intake manifold, and this is used the most by the motor to draw the vapors out. When at WOT, the intake manifold vacuum itself drops to zero vacuum, and the air filter flex hose in front of the TB has a vacuum that the PCV uses instead.
Okay, so 3 fluid oz. is equivalent to 18 tsp. in 8,000 miles, or 1.8 tsp. per 800 miles, or .18 tsp. per 80 miles. Take a 1/4 tsp. (.25) measuring spoon from the kitchen, and imagine a bit less than that (.18) of oil going into your intake system to be burned, spread out over 80 miles.
This matters?
EDITED TO ADD: Using a standard dropper, about 98 drops fit into a teaspoon. Round it to 100, making it 18 drops per .18 tsp.
So 18 drops is being burned per 80 miles. That would be about .22 drops per mile, round that to 1/4 drop of oil per mile, divided into 8 cylinders, so if my math is right we end up with .03 drops per cylinder per mile.
Jeezus, pump the brakes. Climb into your barca with a beer and the remote and watch reruns of Mr Wizard.
09-05-2018, 02:24 PM
Oil catch can effectivness
.....But it does give these millennials and some of the old un-auto educated old farts something to talk smack about when discussing cars......
Climb into your barca with a beer and the remote and watch reruns of Mr Wizard.