tcw3 leaving soot?

[zach1900]

I have been using 1oz of tcw3 per 5 gallons of gas. I have noticed a thin layer of black soot in and around my tail pipe. My question is, is it the tcw3 leaving this soot or is it cleaning something that was already there that I couldn't see. The car runs as well as it always has. I have an emissions test next week and an starting to become paranoid If I'm hurting something. Thanks for any ideas/suggestions. (Tcw3 as in 2 cycle engine oil)

 

[JHZR2]

Ive noticed this on my DI 135i. Stopped using it as a result.

 

[Donald]

Use plain gas, maybe some Techron once and awhile as per label. Leave the TC-W3 for 2 cycle and diesel fuel.

 

[zach1900]

Originally Posted By: Donald
Use plain gas, maybe some Techron once and awhile as per label. Leave the TC-W3 for 2 cycle and diesel fuel.
good idea. I don't know why I feel the need to run anything in the fuel. My prior Nissans never got any kind of fuel supplement and I ran both of them 200K+ each.

 

[AZjeff]

Just finished up 4th tank of added tcw3 just for kicks. No change in mileage, performance or coolness factor. No soot in the tailpipe either. Probably won't bother again.

 

[Jetronic]

the soot will get there regardless.....

 

[zach1900]

I'm starting to wonder if a 4 cycle water cooled automotive engine uses 2 cycle engine oil correctly. I know that chain saw,weedwacker 2 cycle oil is made to stand up to much higher temps than tcw3 which is meant for lower temp outboard motors. Does anybody know the combustion temp of your average chain saw?

 

[Rand]

Some cars are just sooty, my 2007 focus looked brand new after 3 years, my 2015 forester looked like flat black spray paint at less than 3000miles.

2008 Honda accord also looks black and sooty.

2011 Forester looked black and sooty.

Depends on the car and tuning.

If you dont remember how it looked before.. dont blame the TCW3

 

[AZjeff]

^ exactly

 

[Nate1979]

Try cleaning it off and run a few gas tanks without it and see if the soot still appears.

 

[Kawiguy454]

Must keep in mind how lean or rich the mixture is. an overly rich mixture will not completely burn up in the engine or cat so leaves the pipe sooty ...even in absence of TCW3. An out of spec O2 sensor in closed loop can throw the mix way off. Newer cars have self diagnostic to test for bad sensors.
How may of those little Honda's have you seen the kids put a "Power Chip" in that billows black smoke.