[Diy_efi] Re: Zinc and o2 sensors

Torbjörn Forsman torbjorn.forsman
Sun Feb 5 21:46:36 UTC 2006


That depends on the climate. SAE 15W40 will have higher viscosity at low 
temperatures and may cause difficult cold starting below, say, -5 or -10 
?C. But in a warm climate or in the summer, an SAE 15W40 oil will not 
cause any problems.

/Torbj?rn Forsman


Justin justin wrote:
> Would 15w40 work good in motors that use 10w40?  Thanks - Justin
> 
> 
>>----- Original Message -----
>>From: "John Smith" <dirtrider218 at hotmail.com>
>>To: diy_efi at diy-efi.org
>>Subject: [Diy_efi] Re: Zinc and o2 sensors
>>Date: Sat, 04 Feb 2006 12:24:51 -0800
>>
>>
>>
>>Alot of modern diesels have exhaust catalysts too, just FYI. A 
>>tight engine will use such a paltry amount of oil that I doubt the 
>>presence of Zinc could make them or oxygen sensors fail 
>>prematurely. I have not seen any studies on it, though.
>>
>>I use petroleum 15w-40 diesel oil in everything I have that can use 
>>that viscosity. Its a good oil for air-cooled motorcycles with wet 
>>clutches. The diesel oil has little or no moly which will glaze 
>>over the  clutch and wreck it. Petroleum "motorcycle" oil costs on 
>>average $5-7 whereas you can get a gallon of the other for that 
>>much. I use the oil in my cars because I can get it in convenient 
>>4-gallon boxes at Costco. The most common brands I use are Chevron 
>>Delo 400, Shell Rotella T, and Mobil Delvac. I've heard that the 
>>synthetic versions of these are even better yet.
>>
>>
>>>Message: 2
>>>Date: Thu, 02 Feb 2006 20:52:05 -0600
>>>From: "Justin justin" <justin_email at lycos.com>
>>>Subject: [Diy_efi] Zinc and o2 sensors
>>>To: diy_efi at diy-efi.org
>>>Message-ID: <20060203025207.0CA9E3384B at ws7-3.us4.outblaze.com>
>>>Content-Type: text/plain; charset="iso-8859-1"
>>>
>>>I have heard that using rotella and other diesel engine oils in gasoline
>>>engines will make the motor last longer because of the higher zinc
>>>content.  I have also heard that this will kill o2 sensors and catalytic
>>>converters.  My application will not have cats but it will have an o2
>>>sensor.  Do any of you guys know if this is true or not?  The motor is
>>>freshly rebuilt so there really wont be any blow by.  Let me know what
>>>you guys think.  Thanks - Justin
>>
>>
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> 
> 
> 
> 





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