Heavy duty oil?

[LilBerx]

Hey guys, I will probably sound like a dumb@ss with a question like this.

I have major blow by and smoke going on, I talked to a guy at oreillys and he said that If I run heavy duty oil (diesel oil) in my car it will help it out and not burn it as much.

Is this true? I also had a buddy tell me to run straight 30 in it.

 

[Bullitt347]

Any benefit of running heavy oil to combat oil consumption will be offset by accelerated wear elsewhere in the engine, especially on start up due to the heavier oils resistance to be circulated in a timely fashion.

 

[LilBerx]

What about straight 30?

 

[Bullitt347]

Straight 30 is the lessor of the two evils. But you are just putting off short term another repair, and even then straight 30w oil is really not going to do that much for you. When oil gets to operating temperatures it is thinned out pretty good anyway. The most important aspect of oil viscosity is on start up. It needs to be thin on start up so that the oil pump can move it to lubricate bearings and such. The only time a heavy oil would come in handy is if oil operating temperatures are above 260 degrees F. and at that point you need the heavier viscosity to prevent the oil film from breaking down. Otherwise a heavy oil is not needed.

 

[whitey68]

try some restore, i have used it for years

 

[Codydubb]

Timing it help the smoking any at all? It sure runs better!

 

[NIKwoaC]

First off, never listen to automotive advice that an Auto Zone employee gives you. They are no more qualified to give you advice about your car than a McDonald's employee is to give you advice about your diet. They aren't mechanics or engine builders or automotive engineers. They're just some hillbilly who knows how to look up part numbers on a computer.

Second, blow-by and smoking is a result of worn rings and a dysfunctional PCV system. Changing to some funky oil that your engine was NOT designed for, like said above, will only cause problems elsewhere. Fix the problem itself, don't try to cover up the symptoms with a half ass solution. Continue to run a 5w30 or 10w30, and be happy knowing you aren't trashing your bearings every time you start up your car.

 

[CarMichael Angelo]

I guess this is another case of whether or not you're listening to the advice that's being offered to you.You've had blow by since you first started asking questions here. When your dipstick is being pushed out of the hole, and your valve cover gaskets are being forced out, it is a sure sign that you have a bunch of crankcase pressure that is either not being properly vented, or is so extreme, that it is overwhelming the PCV system.
Like Nik (and others) are saying,....fix the problem. Straight weight, or heavy duty oil is not the fix.