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fredwarner5 fredwarner5
New User | Posts: 1 | Joined: 12/12
Posted: 12/10/12
02:55 PM

My friend put about 15 gal of flexfuel in my 2006 Duramax, thinking it was B20 diesel.  It was run about 1 mile before clouds of white smoke poured out.  I drained it as best I could without dropping tank, refilled with diesel.  It sputtered for about 10 miles and then seems OK.  Did it seriously hurt the engine?  

Richies Truck and Auto Richies Truck and Auto
Enthusiast | Posts: 362 | Joined: 05/08
Posted: 12/12/12
08:39 AM

Theoretically, yes it could have damaged the hi pressure related components such as the cp3 and ofcourse the injectors. Only time will tell the severity of the damage. Depending how diluted the e85 was with the diesel already in the tank. The ethanol will burn hotter and faster than diesel if it was of high concentration. If that is the case than its possible to have sustained piston or valve damage. But in most accidental gasoline cases I have repaired, so long as mileage was low, u should b ok.  
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5toMidnight 5toMidnight
User | Posts: 167 | Joined: 03/12
Posted: 12/13/12
10:02 PM

Yes, you damaged the injection system. Expect a very large repair bill soon.  

allenmarton allenmarton
New User | Posts: 2 | Joined: 01/13
Posted: 01/29/13
12:40 AM

nice posts,thanks for the info...