Here are 2 snapshots from datalogs I took back on June 20, 2009 and then today October 7, 2009.

I installed a DIY oil catch can about 1 month ago. I cleaned the intake (oil pooling near the back of it), throttle body, etc.

Before the install, my datalogs would always show timing spikes of 2-3 degrees during a WOT 3rd gear pull. After the install, no more spikes.

I believe the small pool of oil in the intake was being sucked up during WOT pulls and causing the timing spikes.

Burning oil can reduce octane ratings, cause knock, and blacken exhaust pipes (not to mention gumming up valves and pistons.)

Both datalogs were run on the same stretch of highway in 3rd gear from about 3400 RPM to 6000.

As you can see, there is no more timing spikes and the cool thing is, I used the timestamp of the datalogging software to compare how long it took to pull from 54 to 94 MPH using the exact starting and stopping RPM's to compare. In 3rd gear (from 3400 to 5960 RPM's) I have gained .5 seconds. I don't know how much of that can be contributed to the lack of oil being burned, but the conditions for the 2 datalogs were extremely similar and run on the same exact stretch of highway.

 

nice work son

 

Wow... this is VERY interesting. I scanned your sig to see if you're boosted but your not and I've seen these spikes on many, many dyno graphs and dlogs. Interesting to see the effects on a non-sc car.

 

How many miles do you have and how hard have you thrashed it. Sounds like you pushing a lot of oil to have it collecting in the intake!

 

Mine's a 2006 with about 42,000 miles. I do drive "spirited" whenever possible, and run WOT pulls to datalog about once a month.


If you get around to modding your car some more and get some CMDP's, you'll have a chance to see what collects in your intake. It's not a whole lot of oil after 40K, but when I installed my delete plates, it was enough for me to decide to do something about it.

I'd say I collect about an ounce of oil every 500 to 600 miles in the catch can. Trust me, you engine will lose about the same, the only difference is whether you want to burn the oil or dump it out.

If you do a search for delete plates, you'll find some pictures of what the oil is doing to the inside of your engine, including valves, pistons, etc.

 

What are you datalogging with?

 

For those who are interested, this is a great thread that highlights why we need these on our cars along with many great options for putting one together.

https://mustangforums.com/forum/4-6l...modaddict.html

I am about to pull trigger on a Stef's set-up before I get too many miles on the supercharger and this only helps with my justification of the expense

 

I only get about 1-2 oz. every 3,000 miles, some maybe draining back though with the way my catch can sits slightly higher than the pcv valve.

 

I'm gonna do this to my car next time I'm home. I just installed my delete plates with 10k miles on my motor and there was a good amount of oil burned on the butterflys.

 

very very cool to see hard data. I could tell my car was smoother was a catch can installed. Very good to see its faster w/ the can. Do doubt our car sucks in a ton of oil through the intake manifold.