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I have a 2008 C18 Cat engine, which has fuel mix with engine oil. Please let me know what's caused this happening. Thanks.

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Possibly worn rings on piston

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Was having a slight hitch when accelerating up hills then the other day my cat got red hot and it would barely run, now i fixed the cat problem but it wont start, any tips?

When the engine really got hot is there a possibility you may have over expanded some parts and now the engine is sort of tight and is not spinning fast enough to start.

Check for spark and fuel delivery but ......................

Nov 25, 2015 | Cars & Trucks

1 Answer

What would cause a H3 Hummer to burn oil and give off smell. Temperature gauge rises as well.

One thing that could do all of that is a blown head gasket. That would allow the oil to mix with the coolant and the coolant to mix with the engine oil. Have to get it fixed right away or the engine will be trash.

Jan 02, 2015 | 2008 Hummer H3

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bad shift solenoid in transmission ,and white smoke is because you need head gasket,it is broken and you are mixing fuel with coolant,that will cause bad cat converter soon,and your engine will die soon due oil and water mix ,will kill your crank shaft and cam shaft bearing,(check your oil see if it look like milk shake,that is very bad)

Oct 15, 2014 | 2000 Chevrolet Tracker

1 Answer

What can cause my 2008 jeep commander 4.7l V8 to feel sluggish when accelerating? I've changed the plugs, egr valve, map sensor, air filter, pcv valve and oil. I started to notice it after my catalytic...

Why would you be at a dealer?
Why did the exhaust converter fail in
under 12 to 14 years
You know that issue has to be solved long before
a new cat goes on
You need to look at cylinder misfire counts
Fuel Trim
Engine Temp
Cat Temp
& all data
I wouldn't expect a dealer to do what you ask
or tell you a thing, if you asked
Start over at a local shop & be there from time to time
Don't tell them how to do their job, but be proactive.

Aug 12, 2013 | 2008 Jeep Commander

2 Answers

What would cause fuel to mix with oil

if you have white smoke emitted from the exhaust system that means youv blow a head gasket which lets anti freeze in the engine compartmen and sometimes fuel in the oil pan

Nov 27, 2012 | 1995 GMC Sierra

2 Answers

My 2008 mazda speed3 has blue smoke at idle! what can I do?

Mazda released a TSB (technical service bulletin) about this problem. Click to view Mazda TSB 01-004/10.

They recommend replacing the engine oil with 5W-40 synthetic oil. If that doesn't resolve it then they recommed replacing the turbocharger.

You should check with your dealer, this repair may be covered by warranty.

Feb 20, 2011 | 2008 Mazda MAZDASPEED3

1 Answer

I am driving a 2006 KB 250 fleetside, just over 101250km. This is my first diesel vechile and i`m abid worried about my fuel consumption. Done a trip to luderitz recently and used about 38 lts for 390 km...

The injectors have o-rings that will wear and cause fuel leak into engine and cause same smoke problem ,but glow plugs are only for engine can change o-rings only but if it has lot of miles i would do injectors...
however make sure the fuel rail isnt leaking at injector connection.also check exhaust for excessive heat or noise inside cat.converter if you can shake it.....some come apart inside.....
it would be worth having the engine scanned to make sure 02 sensors are good..they control air/fuel mix and if oxygen level is incorrect it will burn more fuel and sometimes fuel scent but not very bad.

Feb 19, 2011 | 1985 Isuzu Pickup

1 Answer

When first started black smoke comes out exhaust pipe,, what could this be

Black smoke is burning oil. Blue smoke is usually transmission fluid due to a leaking modulator valve in the older auto transmission. White smoke is due to water getting in to a cylinder from a bad gasket, cracked block or a cracked head. Black smoke from engines on starting and/or running tends to mean there is fuel leaking into the engine, or the fuel mix is incorrect and not atomised correctly. the main causes are normally a nakered air filter that isnt letting enough clean air into the engine to mix. a blocked fuel filter, which is either not letting enough fuel in, or in some cases, a faulty fuel filter which is letting too much fuel into the engine, and causing black smoke due to excess burning. Black smoke is a fuel/air mixture suggestion problems with injection or carbonation. Cause of black smoke is due to running rich in the fuel air mix. Check the oil,the oil leak,the air filter,the fuel pump and fuel filter to confirm the fault.

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Sep 22, 2010 | 1986 Mercury Grand Marquis

1 Answer

Previa 2001 i change the oil (5w30 with aditiv )cooling liquid ,filtrs,sparks,service for 145000km the engine is running very well gas test ok but after 1000km a light on board show failure engine ....

Hi, this is very normal the chances are your O2 sensors where ok and it was just the cat causing the problem, if the cat is giving the wrong gasses out then this will cause the O2 sensor to seem as if they are faulty, so the warning you get is bad O2 sensors but the fault may well have just been the cat, get the cat changed and you should find you will have no further problems.
Plus as you have changed the sensors then this would rule out them causing you problems in the near future.

once the cat has been sorted the sensors will pick up the correct mixture from the cat and this will then stop the warning lights coming on and it will also make your car run a lot smoother and use less fuel

let me know if you need further assistance ok

plz rate this solution as i have a whole page of unrated posts, thanks

Sep 10, 2010 | 1997 Toyota Previa

1 Answer

I changed the oil on my 2008 nissan sentra 2.0

You should use the viscosity oil recommended in your owner's manual. Using a heavier weight oil can affect your fuel economy. If you overfilled the engine with oil, drain out a quart. Overfilling with oil will cause the oil to 'foam', and if this happens, you are not getting proper lubrication of components, which can result in damage to your engine.

Oct 16, 2009 | 2008 Nissan Sentra

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