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11-07-2017, 09:37 AM
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#1 |
  
Drives: 2015 Chevy Camaro 2LS Join Date: May 2017
Location: MWC, OK
Posts: 815
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Filthy gas?
I have been using pretty much the same gas for months now. Phillips 91 octane. no e85. My tailpipes have stayed pretty clean, albeit a little residue. but last 2 tanks, I have had to clean the soot off my pipes after each fill. Why has it changed?
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11-07-2017, 10:32 AM
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#2 |
     
Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012
Location: Southeast, PA
Posts: 2,093
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Companies might be switching to winter blends, or your car might be running richer for other reasons, like dirty air filter, plugs, other routine maintenance items.
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LS3 Crate Engine Swap | CSP Custom Cam 232/240 .615/.615 113 +3 | Stainless Power LT Headers | Z28 Intake | Borla S-Type Exhaust | FTI Triple-Disc Billet 3200 Stall
2012 Camaro 2SS/RS | 1968 Camaro SS | 2020 Cadillac CT5 Premium Luxury | 2021 Spark LS  |
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11-07-2017, 10:55 AM
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#3 |
   Drives: 2010 Camaro SS/RS Join Date: Mar 2014
Location: somewhere in MD
Posts: 4,883
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Condensation plus exhaust gas = dirty exhaust tips. More noticeable in the fall/winter because the exhaust gas vapors will condense quicker
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2010 2SS/RS
Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53 |
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11-07-2017, 11:43 AM
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#4 | |
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雪の玉
Drives: '22 Z71 RST Silverado Join Date: Feb 2011
Location: South
Posts: 3,415
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Quote:
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11-07-2017, 12:13 PM
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#5 |
 
Drives: 2014 2SS RS, 6 sp man Join Date: Feb 2016
Location: Marlton, NJ
Posts: 461
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Mine are always black. pretty much stock. only stay clean for a few days. One big romp and they are black.
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11-07-2017, 12:19 PM
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#6 |
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Drives: 2015 Chevy Camaro 2LS Join Date: May 2017
Location: MWC, OK
Posts: 815
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Condensation? maybe. but had several dry days after last fill up. Winter blend gas? I have heard of that, but not sure what it is!
Only got 10k on this engine. and newish (5 month old K&N CAI) filter. |
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11-07-2017, 12:55 PM
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#7 |
Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010
Location: Clermont, IN
Posts: 3,297
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2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419.
Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!! |
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11-07-2017, 01:44 PM
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#8 |
Drives: 2011 1LT Join Date: Mar 2012
Location: Crestline, CA
Posts: 3,029
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Thread title made me think about Taco Bell...
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11-07-2017, 02:40 PM
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#9 | |
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Lifestyle = Deathstyle
Drives: 11 SIM 2SS/RS Join Date: Mar 2010
Location: Long Island, NY
Posts: 686
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Quote:
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 11 2SS/RS |
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11-07-2017, 04:18 PM
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#10 | |
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Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012
Location: Southeast, PA
Posts: 2,093
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Quote:
You will notice in the winter that your MPGs will get worse, denser air + winter gas (they put additives so moisture doesn't freeze), and it does cause the car to run a little richer. Your sensors will make adjustments, but you will most likely just need to wipe down the exhaust tips more as you clean.
__________________
LS3 Crate Engine Swap | CSP Custom Cam 232/240 .615/.615 113 +3 | Stainless Power LT Headers | Z28 Intake | Borla S-Type Exhaust | FTI Triple-Disc Billet 3200 Stall
2012 Camaro 2SS/RS | 1968 Camaro SS | 2020 Cadillac CT5 Premium Luxury | 2021 Spark LS |
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11-07-2017, 05:40 PM
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#11 |
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old school chevy rodder
Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012
Location: Oregon
Posts: 5,587
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You should with your engine especially get a catch can and I would direct you to elite engineering. My exhaust tips always get soot from excess fuel and I even have deceleration popping which is unburnt gas in the exhaust catching fire in small explosions when the fuel cut off kicks in it causes the popping and can be tuned mostly out if one desires....But its the sound of music to my ears and is especially prevalent on downshifting and engine braking to help slow to a stop. Switching to winter or summer blends can have a change in the amount of carbon build up also.
You may also occasionally notice water coming from the exhaust which is normal condensation often called; " the coke bottle effect" as they tend to sweat from the temperature difference condensing moisture in the atmosphere on the opposite side of the cold side. Water then gets blown out of the exhaust and can leave tracks of soot being cleaned out..... Humidity does matter....
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 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop |
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11-08-2017, 08:07 AM
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#12 | |
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Drives: 2014 2SS blue Join Date: Jun 2016
Location: Socal
Posts: 689
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Quote:
https://m.youtube.com/watch?v=WotaR41Pc5s
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11-08-2017, 08:32 AM
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#13 |
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Drives: 2015 Chevy Camaro 2LS Join Date: May 2017
Location: MWC, OK
Posts: 815
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Thanks, guys! good to know.. So I guess I can't avoid it and will keep using the same gas. Those stock cans are gone in the Spring anyway!
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