Best way to reduce blowby? 15W-40 or synthetic? Or motor honey?
Best way to reduce blowby? 15W-40 or synthetic? Or motor honey?
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Or, fixing the engine problem causing blowby.
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If you are running a diesel, and you are on a diesel forum so I'll assume that is the case, you should already be using a 40 weight oil. The number that matters once the engine is warm is the last number. If your blow by is excessive with 40 weight oil, the next step is a 50 weight oil. It can be hard to find diesel ratings on say a 20W50, but there are some out there. Mobil 1 has a 15W50 with a diesel rating. The Motor Honey approach will work, but you have no idea what your oil viscosity is after adding a bottle, so I would try the higher viscosity formulations first.
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I will first change the oil with 15 w 40 can take it from there . |
Is this a hypothetical question? Is there a particular car you have in mind? What are the symptoms that lead you to believe there is a blowby problem? Is the crankcase ventilation system working properly?
Sixto 87 300D |
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They kinda all do that. How much does the oil filler cap rattle if you set it lightly over the oil filler hole?
Sixto 87 300D |
If your Blow-by is being caused or increased due to sticking Piston Rings Synthetic Motor Oil might decrease the Blow-by. But, I think there is only a small chance of that working.
There is at least several thread on ways to route the Blow-by out of the Air Filter Housing so that it does not contaminate your Air filter. If you are going to try something like Motor Honey in your Oil you should use single Viscosity Oil because part of what that stuff does is increase the Viscosity of the Oil. I don't think it is a good idea to put it into Multiviscosity Oil because it messes with the multiviscosity part. I have also seen on a Diesel Generator set where increasing the Oil Viscosity also increased the Oil Consumption. |
Sticking piston rings..... Can I fix that with some atf in the oil for anout 5 miles before oil change?
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Blowby isn't wisps... it's smoke under pressure shooting out when you pull the oil cap, accompanied by a light shower of oil droplets in the vicinity of the fill opening if it's serious. As long as the car performs okay, blowby is a Feature not a Problem |
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