Huw

<clare at snyder.on.ca> wrote in message
news:ato1v115v21ul4ufqhldsid9auh45nih1u@4ax.com...
> On Mon, 13 Feb 2006 11:15:05 -0500, "tom" <tjctransport@optonline.net>
> wrote:
>
>>my snake oil comment was based on the fact that when a dealer tried to
>>sell
>>it to me, and me on it, he handed me a "comparison" sheet of different
>>oils,
>>and amsoil synthetic was at the absolute bottom of the list when compared
>>to
>>all the other "inferior" brands when it came to the A.P.I. ratings. I
>>pointed this little fact out to him and his answer was "oh, those ratings
>>don't mean anything". for the record, the valvoline all fleet plus that I
>>had always used was at the top of the A.P.I. ratings.
>
> Valvoline AllFleet is one oil I used a LOT of when in "the business".
> Also used a lot of Shell - Rotella on the farm, fleet, and industrial
> equipment and their premium normal oil (can't remember the name any
> more) on a lot of other vehicles.

Allfleet or mutifleet oils are those that meet API S standards for petrol
vehicles as well as API C standards for diesel. Today they almost always
meet API CH4 for diesel which is a Super High Performance Diesel [SHPD]
standard for extended drain intervals up to 45000kms.

Combining this high detergent long drain specification with approval for
petrol engines gives the highest quality dino oil available today but if
used in an old petrol engine with many existing deposits it might cause a
problem.
The main drawback is that multifleet [mixed petrol and diesel] heavy duty
oils are mainly available as 15w/40 viscosity which is not always suitable
for all engines. Apart from the viscosity this type of oil is superior in
many ways to lesser synthetics.

Huw