Hi Ernest,
In the overall sense of things, the number of people using BioD is still
pretty small. I haven't heard or seen anything about its affect on oil and
oil change intervals - sorry -
Larry T (66 MGB, 74 911, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
PORSCHE POSTERS! youroil.net
800-583-8601
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- Original Message -
From: "ernest breakfield" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List"
Sent: Saturday, May 24, 2008 12:45 PM
Subject: [MBZ] extended oil drain intervals for synthetics used with
BioDiesel (was: Re: Here come the diesels!)
> hi Larry!
>
>seen anyone do any comprehensive oil scanning on diesels using
> synthetic oils with B100?
>
>i haven't been able to get anything from any of the synthetic
> manufacturers about what happens to their products when using BioD;
> seems that on one hand, the need to change oil so often in our 617 would
> be reduced on the basis of soot buildup (because there basically *isn't*
> any), but on the other hand i'm wary about extending drain/fill
> intervals because of the increased solvency of BioD and uncertainty of
> what it does to the synthetics.
>for the last 50K miles i've been using B100, i've been doing 3K
> changes while using Delo, because it's pretty obvious that the BioD
> breaks down the oil faster than #2.
>
>
> cheers!
> e
>
>
> LarryT wrote:
>> We've done a number of TBN (total base number) tests for customers
>> over
>> the years and they all seem to say the same thing - the additives that
>> control the acids created by the combustion process are typically
>> exhausted
>> by around 7500 miles. Based on this I generally suggest oil be changed
>> every 5000 miles or so which allows some safety factor as the TBN can be
>> depleted at different rates depending on a variety of factors. Of
>> course,
>> some customers have special situations which dictate shorter changes.
>>
>> We have not done many TBN tests lately as the Lab has increased the
>> price to $20 per tests - which is *my* cost. I should charge customers
>> $20
>> plus a reasonable markup but I feel this is extreme and suggest customers
>> considering TBNs to wait and see what the Oil Sample Report says before
>> making any decisons.
>>
>> But I think 3000 mile changes are a waste of money -
>>
>> Larry T (66 MGB, 74 911, 91 300D)
>> www.youroil.net for Oil Analysis and Weber Parts
>> Test Results http://members.rennlist.com/oil
>> PORSCHE POSTERS! youroil.net
>> 800-583-8601
>> Weber Carb Info http://members.rennlist.com/webercarbs
>>
>>
>>
>> - Original Message -
>> From: "Alex Chamberlain" <[EMAIL PROTECTED]>
>> To: "Mercedes Discussion List"
>> Sent: Friday, May 23, 2008 12:46 PM
>> Subject: Re: [MBZ] Here come the diesels!
>>
>>
>>
>>> On Fri, May 23, 2008 at 9:32 AM, Allan Streib <[EMAIL PROTECTED]>
>>> wrote:
>>>
>>>> Go by what the owner's manual says, not the sticker the shop puts in
>>>> your window. Those ALL still say "3 months/3000 miles" because they
>>>> want the extra business.
>>>>
>>> Chains like Jiffy Lube push the 3K mile change interval really hard,
>>> too. I think the average person probably changes their oil more often
>>> than necessary, and their coolant, brake fluid, and transmission fluid
>>> not often enough.
>>>
>>> Alex
>>>
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>>
>>
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>>
>>
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