One mechanic (or auto service employee) told me he doesn't use
synthetic oil because it doesn't contain as many detergents as
conventional oil. As a result, your engine becomes dirtier.
He even said the reason synthetic oil does not need to be
changed as often as conventional is because synth oil does not
get as dirty since it doesn't have as many detergents to clean
Another mechanic (or auto service employee) I spoke with had
no knowledge of the first employee's claims. It seems if you
talk to 4 people, you'll get 4 different answers ;-)
Your chances of getting an informed answer at a oil change place are about
the same as hitting the lottery. You may hit bits and pieces of the correct
answer, but it is not likely you will get the entire answer.
When in doubt, follow the automaker's recommendations. You can also check
the faq section at www.toyota.com. They built the car, they know the most
about it, certainly more than someone at a quick lube place who has only
taken Auto Shop 101, if even that.
Dunno. I think the synthetics have enough detergents to do the
Myself, I think "extended" oil change schedules are a bad idea
in general. Thats why they started seeing gelling problems, etc..
One advantage to synth oil is you usually don't have to worry
much about gelling as long as they change it within a normal
period. Also, the cold weather performance is much better.
IE: most all people up in frigid Alaska, etc run synthetic oil.
I won't let a car go over 5000 miles without an oil change.
I also always change the filter every time.
Sure, the oil itself doesn't wear out, but the additives do.
And to me, one of the primary reasons to change the oil
is to clear the dirt, moisture, unburnt fuel,etc, from the
Oil can get quite diluted after a while. Real bad in stop-go
driving where the engine is lucky to get warmed up
before being shut off.
Being I change my oil fairly often, I was kind of dubious
about spending appx 6 bucks a quart for say mobil 1..
Being I'm gonna dump it fairly quick, thats a lot of money
to spend over time..
On my corolla which I recently bought, I just did the first
"for me" oil change. I compromised... I used the castrol
syntec or whatever they call it. Is a blend of dino oil,
and synthetic, and is supposed to be pretty good for
short trip driving. It was about 3.75?? appx for a quart,
so not quite as expensive as all synthetic oil.
I'm not sure how it compares to some other brands,
but I did notice it made my engine run a bit quieter
than the old oil..BTW, I used the standard 5w-30 weight..
Synthetic oil will reduce engine wear over a long period
of time, but using dino oil and changing every 3-5k miles
will also do pretty well. Most people will get a new
car before an engine wears out from using any type of oil,
as long as it's changed fairly regular.
The only kind of oil I would never use in a modern car is
the cheap re-refined stuff..
> Synthetic oil will reduce engine wear over a long period of time
I took the plunge and switched from dino to synth.
I don't know if it's my imagination, the newly pumped up tires,
a placebo effect, or because I was first driving downhill after
exiting the dealership's oil bay, but my car seems
to be zipping along with a lot less effort.
The engine seems to work more easily.
So far I like Mobil 1!
Thanks for the suggestion, Jeff. I actually do air up
the tires myself, but sometimes I might lapse for 2 or 3
However, you seem to be mistaken when you say a different
kind of oil won't lead to a noticeable difference.
Nmk5 just wrote that after changing to Castrol's synthetic blend, he
noticed "it made my engine run a bit quieter than the old oil."
I meant you would never notice the increase in power. You might notice that
the engine makes less noise, starts more easily in the dead of winter (or
the dead of spring in the Artic), and oil pressure comes up sooner in the
dead of fall in the Artic. If you thread a temperature probe down the oil
dipstick tube, you probably would notice that the temperature of the oil is
lower, too. My dad had a Peugeot 505, which had a gauge for oil temperature.
The oil temperature was lower with synthetic oil than regular oil.
One would expect oils that should meet the same fairly tight standards of
friction reduction, viscosity and additives would have fairly similar
characteristics - that is, after all, the point of standardisation.
Well, for babies, natural oil comes from breasts. Synthetic oil comes from a
powder or in cans. In this case, natural oil is almost always far better.
And the additives are fatty acids that are important for brain development.
Hopefully, the oil filter never needs changing. It is normally, self
repairing. If it does, it means a kidney transplant.
=I use Mobil 1 and Purolator Pure One filters.The base gasket
construction is excellent.
Tried Mobil 1 filter once, and it had this odd characteristic where
the base gasket rotated in relation to the housing turning, so the
gasket did not move during tightening. Resulted in a small leak for me.
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