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

[Avi <Avi@cosmoslink.net>]

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 


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
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