Re: Synth blends [Was: Re: Warming up engine]

[Avi <Avi@cosmoslink.net>]

John, 
 Most synthetic oil will flow either way John, the cold part and the hot
part, Kapish......, go dig up some old information published (by Mobil)
that will tell you that this API test IS NOT APPLICABLE to synthetic oil,
and that is why the early Mobil 1 oil was a single weight.
Now, why in the hell you need a multi viscosity rating if the 30W oil STILL
flows at 0F?...........here is the answer, because people are used to the
multi  viscosity rating so, that is what you have to sell..........directly
from Mobil engineer visiting our CFR (corporate fuel
research)facility...................

OK, I feel better now.....


Avi
NO need to update me about Mobil 1 changing their formula, it is applicable
to my statement above
    


At 08:24 PM 12/20/97 +0000, you wrote:
>
>
>Avi wrote:
>
>> John,
>> The whole subject of multi viscosity IS NOT APPLICABLE to synthetic oils,
>> the reason the term is used (by the oil MFG.), is because the public is
>> used to the multi viscosity term, it is strictly a MARKETING gimmick....
>> The ONLY way the multi viscosity will be applicable is if the synthetic oil
>> is not so "synthetic" meaning a lot closer to std. oil,
>> Avi
>
>Oh no you don't. Your  not geting away with that. To get an API rateing,
every
>oil synthetic or not,must meet the set numbers for viscosity at 0F and
210F for
>it's wieght range.
>So a 5W50 std and a 100% synthetic must meet the same test numbers to be call
>5W50 or 10W40.
>The test BTW is not done in a engine. It's done on a lab bench setup. And
is not
>done under
>pressure. Thats why a  synthetic 10W40 oil will show a higher viscosity
than a
>std 10W40 oil.
>
>
>>
>>
>> At 06:08 PM 12/18/97 +0000, you wrote:
>> >
>> >
>> >Avi wrote:
>> >
>> >> Your father USED to be correct, certain kind of synthetic oil (ester
based)
>> >> used  to do what he describes, sludge.
>> >> As for your wanting to switch to synthetic or smi synthetic, stick to
std.
>> >> oil as recommended by your owners manual, unless you are going to the
North
>> >> Paul (I used to live there, WI MN.........) where the temperature drops
>> >> below 0F on a regular bassis.
>> >
>> >No stick to the wieght. If it calls for a 10W30 use a 10W30 synthetic.
>> >
>> >> Avi
>> >> synthetic oil has an excessive leak down rate and poor adhesion (runs
down
>> >> too quick), your oil pressure will run lower and you might have your oil
>> >> pressure light flickering at times, especial at idle.
>> >
>> >Not if your useing the right wieght oil synthetic or not.
>> >
>> >>
>> >>
>> >>
>> >>
>> >> At 06:23 PM 12/17/97 -0500, you wrote:
>> >> >This talk of oil and warming up the engine brought up a question I had.
>> >> >My car has been dealer serviced all its life, but now that the free
>> >> >service has expired I'm going to go ahead and do some stuff myself,
such
>> >> >as changing the oil.  Now being a poor college student I can't really
>> >> >afford synthetic oil, but I wanted to try some synthetic blend.  Less
>> >> >expensive than full synthetic, but (at least I think) at least a little
>> >> >better than regular dino oil in the cold.  The thing that prompted
me to
>> >> >even think about this was the *horrible* valve racket the V6 makes when
>> >> >it's 20F or so outside and I start it.
>> >> >So anyway, I get the stuff, and my dad sees it (oops) and says "are you
>> >> >kidding?  Take this stuff back, it will ruin your engine!"  I had never
>> >> >heard this before, and on more prompting he said that if the synthetic
>> >> >oil mixes with the dino oil left in the crankcase, it will turn to
>> >> >sludge and ruin my engine.  I'd never heard that before, and politely
>> >> >(so I thought) pointed out to him that synthetic *blend* implies that
>> >> >it's already mixed with dino oil, but to no avail.  The compromise was
>> >> >that I'd ask someone knowledgeable about it and make sure that it
>> >> >wouldn't screw anything up.
>> >> >
>> >> >So who is more knowledgeable than you guys?
>> >> >
>> >> >Anyway, all I need is for someone to say "no this won't screw up your
>> >> >engine" so I can change my rapidly darkening oil.
>> >> >
>> >> >I hope that this doesn't start another aweful thread about the relative
>> >> >merits of different oils!  All I need is "this will hurt" or "this will
>> >> >not hurt."
>> >> >
>> >> >TIA!
>> >> >
>> >> >Elliott
>> >> >
>> >> >"Et in Arcadia sum?"
>> >> >
>> >> >
>> >
>> >John
>> >1990 CQ
>> >
>> >
>> >
>
>  John
>1990 CQ
>
>
>