Re: [Chrysler300] More Oil Stuff...

["Dave Grove Grove Automotive" <groveautomotive@xxxx>]

Not an "oil expert" myself, - but (FWIW), I do recall that Chrysler
recommended 15w40 oil for their Turbocharged engines. They also
*specifically* stated to NOT use 10w40.

Regards,
DaveG.
----- Original Message -----
From: Andy Mikonis <r41hp@xxxx>
To: <Chrysler300@xxxxxxxxxxxxxxx>
Sent: Thursday, July 11, 2002 11:05 AM
Subject: Re: [Chrysler300] More Oil Stuff...


>
> I was always taught to go with the single grade oil,
> too. I spent my formative car-owning years in Florida
> and this was thought to be best in that hot climate.
> But I read something interesting:
>
> Patrick Bedard, in the November 1999 Car and Driver
> quotes an Ed Kollin of Lubrication Sciences; he makes
> custom blended oils, and Bedard asks him about the
> best oil for an occasionally driven 'keeper car.'
>
> He says oil has gradually evolved; the amount of the
> primary anti-wear additive zinc dialkyl
> dithiophosphate (ZDDP) has been reduced by 25% because
> it is harful to catalysts. Also, he says gas
> additives MTBE and ethanol dilute oil by 5 to 10% and
> are very corrosive to the materials used in older
> engines. He suggests corrosion is the worst enemy for
> our cars - more so than wear at startup.
>
> His "off-the-shelf" solution: "C" grade 15W-40 oil for
> diesel engines. Why?
> 1. The "oil part" is the same, and 15W-40 is thicker.
> 2. 80% more ZDDP.
> 2. 30-50% more corrosion inhibitors and detergents:
> these oils are designed to neutralize the sulfuric
> acid produced by diesel fuel - this takes care of the
> corrsion problem. He also says the higher detergents
> will free up sticky rings "quickly."
>
> He cautions "nitrogen compounds in the high dose of
> dispersant may cause some seals to leak." Also, if a
> non-detergent oil was used before, the detergents will
> knock "chunks of sludge loose", possibly clogging
> lifters.
>
> Interesting stuff. I don't know anything about it.
> Haven't tried it yet. Thought about it. Comments?
>
> Andy
>
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