How long do you want the engine to last? Do you think the owner's manual is
wrong? I have a 99 Silverado with the 5.3L, 4x4. It has 160k miles and
doesn't use oil. I change oil every 8k. Lots of experts can tell you the
importance of oil changes and minimizing wear on the engine. In the 50's
and 60's my dad changed oil frequently. He added a quart of kerosene and
ran the engine for about a minute before doing the oil change. He claimed
it got the sludge out. In those days, it might have been true.
I change oil on our 03 Envoy anytime after the oil life indication reaches
50%. Generally around 6000 miles. You won't hurt anything changing at 3000
but you won't know if it helps either. Unless someone were to run a
controlled test, using multiple vehicles and various driving schedules to
prove otherwise, I think it's generally a "feel good" item.
Go ahead and change it ever 1000 miles if it makes you feel better
The oil companies need the money very bad now that gas is about $3.oo
Over the past 20 years I have changed ever 5 to 6 thousand and have not had
problems associated with the oil .
Something else wore out first..
Just curious, what wore out?
as to big oil needing the money, unless
your using Mobile, shell, chevron etc in the crankcase as well as the
how is 4-5 qrts helping big oil? One thing that has struck me funny about
the whole oil price fiasco is a qrt of motor oil has not gone through the
Intersting isnt it.
i use Ams/oil and change it every 25,000 or once a year
which ever comes first. Have use it since 1974 and have put
170+K on three s-10 trucks with No problems
in my opinion,, if you drive highway miles you can go the
8000 .if you
just take short trips change at 3000 . lucas
I change the oil in my '03 Envoy about every 5000 to 7000 miles, always used
Castrol 10W30 in it, and most all vehicles I have owned, never a oil related
problem, but whats the pros and cons about synthenc motor oils, thinking of
using it on the next vehicle, wonder if it would hurt to switch to it with
so many miles on it, 120K miles, and my 2000 Safari van, 4.3 V6 with 60 K
miles on it, hear it helps on gas milage, but is the higher cost worth
I have an 03 Envoy. I usually change the oil every 3000 miles as well. I say
usually because the oil doesn't break down as quick w/highway miles. So I
look at the oil to see how dirty it is. I may go as much as 5000 miles per
change but no less than 3000. However, because of having to maintain 7
vehicles I recently switched to synthetic and still change it based on how
dirty it looks which has always been sooner than the oil manufacturer
recommends. Personally, i'd rather be safe than sorry. Ounce of prevention....
Message posted via CarKB.com
fyi,, i allways used penzoil dyno oil in my air cooled engines. i
went to synthetic this spring and those little engines really run alot
better..especially i could tell the difference on my airens rocket
tiller with 7 hp tecumseh cast iron engine... i tilled with last years
oil the first time ,changed to syn with old oil hot.. aint that
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