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

[John Graham <jgraham1@erols.com>]

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