From: techman41973 on
Are there any real quality differences between oil brands in the
bottle (conventional not synthetic)?
Is there any real quality differences between bottled oil and the
bulk oil places like Jiffy Lube use?
Thanks
From: jim on


techman41973 wrote:
>
> Are there any real quality differences between oil brands in the
> bottle (conventional not synthetic)?
> Is there any real quality differences between bottled oil and the
> bulk oil places like Jiffy Lube use?
> Thanks


You haven't defined what you mean by quality. For example if you think
quality means reducing engine wear, there is very little difference that
can be measured between brands of oil when it is fresh and clean.

If you had a hundred cars that were all identical and driven
identically the same but used different brands of oil. Then if you were
also inclined to change oil on these vehicles every 3000 miles, it is
extremely unlikely you would ever be be able to determine a correlation
between oil brand and engine wear.

If instead you changed the oil every 6000 miles you still probably
won't be able to see any differences between most of the brands in wear
based on which oil was used. At that maintenance level level you might
find one brand where the vehicles using that brand had slightly more
wear than the others (after many many miles).

If instead you changed the oil every 12000 miles on your 100 identical
vehicles after many miles you would probably be able to see some real
differences in the correlation of engine wear to oil brand.

So buy a hundred cars and hire a 100 trained drivers and follow
regimen number 3 and in a few years you can come back and tell us what
brand provides the best wear protection.


-jim
From: Kruse on
On Dec 28, 4:05 am, techman41973 <techman41...(a)yahoo.com> wrote:
> Are there any real quality differences between oil brands in the
> bottle (conventional not synthetic)?
>  Is there any real quality differences between bottled oil and the
> bulk oil places like Jiffy Lube use?
> Thanks

There is differences between oil brands. But if you change your oil
regularly and at a maintained schedule,
your car will easily make it to 250K, even if you use a quikie lube
with bulk oil.
Same with filters. There is a more noticeable difference here between
your premium and economy filters.
But once again, a regular maintenance schedule will have your car wear
out before your engine, even
if you use a Fram.
From: hls on

"techman41973" <techman41973(a)yahoo.com> wrote in message
news:31b79c0f-d2cc-45f5-92ea-bd6959f71e85(a)22g2000yqr.googlegroups.com...
> Are there any real quality differences between oil brands in the
> bottle (conventional not synthetic)?
> Is there any real quality differences between bottled oil and the
> bulk oil places like Jiffy Lube use?
> Thanks

Bulk oil and packaged oil are the same. It is just a heck of a lot cheaper
to buy oil in bulk than in the smaller packages.

There are differences between different brands and variants of oil.
Largely
the additives packages may be different and present at different
concentrations.
Most of us have a preference for a particular oil, based on personal
observations
or on advertised qualities. Not very accurate methods, often, for
selecting the
best product.

From: Don Stauffer on
techman41973 wrote:
> Are there any real quality differences between oil brands in the
> bottle (conventional not synthetic)?
> Is there any real quality differences between bottled oil and the
> bulk oil places like Jiffy Lube use?
> Thanks

All motor oils must pass tests by SAE and a few other agencies. So they
meet certain standards. Yet they may be different. Any number of
additives can meet performance specs. While most oils can be used in
any engine as long as it meets viscosity and service grade requirements,
occasionally there is an engine that doesn't like one brand as well as
others. This is getting to be much rarer today, however.