Same to you!
BTW, have you seen the random forged posts using your name (and
others) all over the boards? They contain excerpts from what appears
to be a boring novel. If so, do you know if this is due to a
newsreader software virus or has usenet data been hacked or?
Toyota MDT in MO
The old method is wasting your money. The 3000 mile change is suggested
by -- People that sell oil changes-- what a surprise.
Most car manufacturers suggest anywhere from 3000 miles to 7500 miles
depending on your driving conditions. I've used 7500 miles on cars that
have lasted me 200,000 miles. My driving is a mix of highway and town
driving, many trips are 25 miles.
Read the manual. Buick has invested millions of dollars over the years to
get it right on oil changes. My present Buick has 122,000 miles and only
once did I need to add any oil between changes. They build a good engine
The following is the response of a GM engine development engineer
The following is the response of a GM engine development engineer to a
motorcycle forum on extended mileage oil changes. The link to the
was posted on VV months ago. I found it so interesting I saved a
Read with an open mind and form your own opinion about your favorite
and oil change habits. Only the GM engineer's responses to questions,
converted to plain text format, are included. The GM engineers
experience and credentials are in the first few sentences of the last
paragraph. It's taken special handling to get this long message
thanks to vv-help. I've got the entire original in pdf format for
John, can you provide a copy of this in pdf format or direct me to it?
I can remember when the 3K oil change
was like draining tar from the crankcase.
It must be better tolerances, unleaded gas....
My BUICK 3.1 has 85K miles on it.
At 5000, I start to get nervous waiting for "Change Oil"
but the dipstick shows oil almost as clear
as when it was last installed.
Filters, fuels, engine tolerances and materials, oils and the additives in
them have all changed. The only thing that has not is the recommendations
of the Jiffy Lubes and such that make their money from oil changes. While
it does not make sense to try to save $20 at the expense of a $30,000
machine, it does not make sense to pour it down the drain either.
Our '00 3.1 Century has 160,000kms on it and the oil looks clean at
The "Change Oil" light never comes on and stays on. I 've changed the
8,000 and 16,000kms and it never looks that dirty, like in the old
It's been a good engine except for the famous intake gasket which I
replaced this time last year, 25,000kms ago. Thankfully we've had mild
winters or I'd have frozen changing it.
None. I've driven many of them to 200,000 miles. The last car I got rid of
was a '91 Regal with 150,000. My '01 LeSabre has 122,000 and only once did
I have to add oil (1/2 quart) between changes.
Mechanics make money changing oil too. If you drive under severe conditions
then 3000 miles may be the right time, but for most of us, it is a waste.
Did you ever ask the mechanic or Jiffy Lube place why they say 3000 miles?
Do they ever ask you what kind of driving you do so they can make a proper
recommendation? Do they ever mention the condition of your oil or the
filter? Do they look up a reference for your particular made and model?
Nope, they just continue to say "come back in 3000 miles" and put that
little sticker on the windshield so you will feel guilty when you exceed it.
It your money so do what you want with it, but there is no justification for
me not to follow the manufacturer's recommendations of 7500 miles for my
driving conditions. I also use regular 87 octane gas as stated in the
This has been discussed a number of times here. That system does not
check any oil parameters. Its response is output from a calculation - an
which simulates oil life.
Use it if you want to. Change your oil when you want to. You will only get
trouble if you dont change your oil reasonably within the manufacturers
you have an engine failure that GM can worm its way out of.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.