On Sun, 16 Jun 2019 21:11:48 -0400, wrote:

On Sun, 16 Jun 2019 16:42:04 -0400, Clare Snyder
wrote:

On Sun, 16 Jun 2019 12:00:13 -0400, wrote:

On Sun, 16 Jun 2019 05:58:37 -0700 (PDT), wrote:

My mechanic likes to use Castrol extended and change oil every 5000 miles. I have alway s used Pennzoil 10/30 and changed oil every 3000 miles. which one is right? Or both of us right? Whaddaya think guys?

I think you are wasting oil.
3000 miles is far too frequent.
When was the last time you heard about an oil related engine failure,
even with people who run the same oil for a couple of years?
Yiou haven't been reading the automotive press - pbviously.

EVERY ONE of the "coking" failures, whether Chrysler, VW, Toyota, or
who-ever is a "lubrication related failure" - and virtually NONE of
them occured on a vehicle following the "severe service" oil change
specification.

I never even heard of a coking failure but I do know a lot of old cars
that were still driving around with 200,000 miles on them and maybe a
total of 10 oil changes. My daughter had one. It was sold running but
the body was so rusted out, and the interior trashed so badly, I only
got $900. The guy did start it up and drive it away tho. (1989 Accord
in 2001). My sister and 2 other ladies I know had the same philosophy.
Put gas in it and drive.
It's what killed so many chrysler v6 2.7 engines. Also gave VW
1.8T engines a bad name.Toyota 3 liters from '97 to 2002 also had the
issue. GM timing chain failures were another lubrication related
failure. If you went by the OLM to tell you when to change oil you
were pretty much guaranteed a failure eventually - which is why GM
recallibrated the OLM.

OLD cars were not as sensitive to it as the "newer" engines - nineties
and early two thousands.

Oil changed by the severe usage cycle, and particularly those running
synthetic oil changed regularly, did NOT have the problems
A local chrysler mechanic said he never saw a 2.7 fail "when properly
maintained" and they replaced TONS of them. The Toyota dealer said
the same. They had NO failures among their customers who followed
THEIR recommendation - "follow the extreme use schedule" - or those
running synthetic oil on the regular cycle.

VW owners using synthetic oil had a lot fewer problems as well.

Going back to the 2.6 liter Mitsu****ty engines Chrysler used in the
K and C series, and mini-vans the 6 foot long timing chains didn't
rattle and the balance shafts didn't sieze either if the oil was
changed often,