[alfa] Re: alfa-digest V9 #937

["Brian Jones" <alfa_digest@xxxxxxxxxxx>]

Keith
You are right about the Multi ratings. Many "fleet oils" are certified for
both gas and diesel service. These oils are made for service fleets i.e.
many combination of diesel and gas engines operated by an outfit) this way
they only have to buy 1 oil for the fleet. BTW the S= spark C= Compression.

Brian Jones
95 164 Quadrifoglio
Seattle Wa
> Date: Sat, 8 Nov 2003 04:34:20 EST
> From: Alcon98340@domain.elided
> Subject: [alfa] Flushing oil (was Diesel oil)
>
> Keith Walker said:
>
> "As I understand it diesel oils have a very large detergent content
compared
> to oils for normal petrol engines. Maybe the zinc content is to make up
> for the detergents.
> I wouldn't trust the stuff in a high revving petrol engine, although I
> might well use it as a flushing oil"
>
> My thought would be that having a higher level of detergents would
> actually be a benefit. Perhaps someone who has more of a background
> in things of this nature could comment whether that is correct.
>
> Also, I would think that even though diesel engines don't rev as high as
> their gasoline counterparts, they certainly have their own environmental
> hostilities to contend with such as an arguably "dirtier" burning fuel and
> higher compression ratios. One more thing to add is that many diesel
> oils also have a rating for gasoline engines as well. Apparently the "S"
> in an SAE/API rating for gas engines stands for Sevice, while the "C" for
> diesel engines stands for Commercial. I have included this even at the
risk
> of sparking (pardon the bad taste in humor) controversy about what these
> letters do or do not stand for. I believe that the currently used spec for
> gas
> engines is SJ or SL. I am not sure of the current diesel spec, although it
> may be CI.
>
> A friend of mine was telling me that years ago his father used something
> different to flush car engines: kerosene. Apparently he would drain out
the
> oil, fill with kerosene, drive around the block, drain out the kerosene,
> change
> the filter, and add fresh oil. It was quite effective according to my
friend.
>
> - -Josh
> '71 1750 Berlina
> '72 2000 Berlina
> '84 GTV6
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