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Can a tune stop oil consumption?

W/T_Deluxe

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W/T_Deluxe Enthusiast

W/T_Deluxe

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Hey guys I have a quick question i've been pondering. Im running a black bear tune with my AFM turned off. My question is will this help me beat back the oil consumption issues? I hear alot of talk about the cylinder deactivation causing oil consumption, with some being worse than others. I havnt noticed it on mine yet, and im wondering if turning the system off will help. If not I have no problem with someday buying the kit to remove the system completely and possibly going with a 6.0 cam or aftermarket of some sort. Anyway anyone have an experience with this?

BlackZ71Silverado Senior Enthusiast

BlackZ71Silverado

Posted
Posted

With the cylinder deactivation causing loss of oil, it should help now that you have it turned off. Mine has been turned off since the first week I had it and I have no oil usage at all. My brothers truck is all OEM and at 25,000 miles there is no oil consumption. Guess some people have better luck with this than others.

yukon25008.1 Senior Enthusiast

yukon25008.1

Posted
Posted

Whats 'afm' ?

If you do a 180 thermostat and tune for it it will help with the oil, it did in my 8.1..

W/T_Deluxe Enthusiast

W/T_Deluxe

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Active fuel management, it's what turns the engine into a four cylinder when all eight are not "needed".

BlackZ71Silverado Senior Enthusiast

BlackZ71Silverado

Posted
Posted

Don't touch the thermostat, it's not an issue with oil consumption. Diesel engines and gasoline engines are two different animals and can't be compared.

 

Problem IS the AFM and GM has known this, that's why they have several "fixes" for it if it happens. With the AFM diabled, you should not have to worry about the oil issue because the engine is working like it's supposed to, not shutting down half the engine and then starting back up again at certain rpm's.

W/T_Deluxe Enthusiast

W/T_Deluxe

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Thats pretty much what I was figuring myself. I guess I just kinda wanted some sort of re-assurance. I was wondering is since the system is still there with its special lifters and all if it would still present a issue. Looks like I should be good, which is nice since my friends dads 07 with afm just started consuming oil. Since I got the auto-cal maybe I can see if he would like me to get an extra license and shut his off too.

  • 2 weeks later...
FredP Enthusiast

FredP

Posted
Posted

My beast is a 2010 Sierra, but I never had an oil consumption problem. You'll definitely like the result of disabling the AFM (or DOD). I had mine dyno-tuned at a local shop in, he used HP Tuners. It cost me 2 credits to disable the AFM, tune the tranny shift points, and change to a 93 octane tune. It was worth every penny. I picked up 13 HP plus some torque. You may have to go back to tweak the tranny, I did, but that was a quick visit. I had the tuner add +2mph to all speeds, lower the throttle pos for all downshifts except 1st, and hold 5th until 55mph. I talked about all this w/the service manager at my GM dealership and he didn't have any heartburn with what I did. Believe me these guys know that GM is shooting for mileage and sacrificing performance... Just be sure if you take the truck in for service that they don't reflash the comupter. Also, there's no issue w/inspections, at least not in my part of VA.

 

Good luck,

F

BlackZ71Silverado Senior Enthusiast

BlackZ71Silverado

Posted
Posted

Thats pretty much what I was figuring myself. I guess I just kinda wanted some sort of re-assurance. I was wondering is since the system is still there with its special lifters and all if it would still present a issue. Looks like I should be good, which is nice since my friends dads 07 with afm just started consuming oil. Since I got the auto-cal maybe I can see if he would like me to get an extra license and shut his off too.

 

 

The problem is really not the lifters. It's the deactivating/activating that causes the issue. As long as it's disabled they will function like non-afm lifters and you should not run into an oil consumption issue.

If all he would want is the AFM shut off, you can pick up a used DS Predator pretty cheap. May want to look into that depending on how much the BBP license is.

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