Been asked a million times..need an opinion..synthetic oils - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-29-2004, 10:15 AM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default Been asked a million times..need an opinion..synthetic oils

I hate to beat a dead horse here...but I need some advice...

I'm sure as many of you know that I sold my 93 Bonnie and bought a brand new 04 Cavy a few weeks ago. Well, it'* almost at 3,000 miles and time for the first oil change.

I've never used synthetic oils, but am considering it. I've heard that it'* best to start using them when the engine is new (is that true?). Mobil1 seems to be the concensus around here for synthetic oil...but what is the oil change interval that you guys use? 7,500 makes me real nervous! But it'* too expensive to change out every 3,000 miles! Any thoughts?

And what filter performs best with synthetic oils?

And a general question...is the life expenctancy of the engine increased THAT much if I use synthetic every 5,000 miles vs. the typical Castrol that I run every 2,800-3,000 miles?
vital49 is offline   Reply With Quote
Old 10-29-2004, 11:06 AM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

I run it in my 93. 2 years now. My feeling is to NOT run it on a new one until after the motor is broken in.

On SOME high mileage motors, it can be a problem. Studies have shown Mobil1 is more effective at OVER 5k when compared to dinosaur juice at 3k. Some of those studies are posted here.
willwren is offline   Reply With Quote
Old 10-29-2004, 12:25 PM   #3
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Maryland, USA
Posts: 3,089
Thanks: 0
Thanked 0 Times in 0 Posts
95SLE is on a distinguished road
Default

Will:
I have 10K on my new Bonneville. Are you saying that it is OK to switch to synthetic at this time? Also it sounds like you are recommending that on a new car regular motor oil is preferable to synthetic. Is this correct?

The reason I ask is that I am 90% sure that I want to switch. I have never run a synthetic before in a car and cannot find a valid reason not to change over at this time. Your statement sort of validated my decision to switch at this time.
95SLE is offline   Reply With Quote
Old 10-29-2004, 01:47 PM   #4
Senior Member
True Car Nut
 
Join Date: Feb 2004
Location: Pennsylvania
Posts: 5,177
Thanks: 0
Thanked 0 Times in 0 Posts
Twister97 is on a distinguished road
Default

I heard you can switch to synthetic oil for your first change.
Twister97 is offline   Reply With Quote
Old 10-29-2004, 02:04 PM   #5
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Quote:
Originally Posted by willwren
I run it in my 93. 2 years now. My feeling is to NOT run it on a new one until after the motor is broken in.

On SOME high mileage motors, it can be a problem. Studies have shown Mobil1 is more effective at OVER 5k when compared to dinosaur juice at 3k. Some of those studies are posted here.
When is the motor considered "broken in"?
vital49 is offline   Reply With Quote
Old 10-29-2004, 02:27 PM   #6
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

I've seen recomendations that say to wait until 10k to switch. However, for the first oil change in both the GTP and SSEi, which was at right about 1500mi or so for both, we used the Valvoline Dura-Blend, which is half synthetic, half dyno oil, and thats what we always have put in them since then. I switched to it in my STE on my last oil change and I'm very happy, I was using the max life stuff before then and it didn't seem to help the smoking problem (the car would POUR blue smoke out the back, but only at idle when the engine was completley warmed up...I'm pretty sure its something in the turbo), but when I switched to the durablend, the problem virtually dissapeared. It just barely smokes a little blue smoke after you let it idle for like 10 minutes, you pretty much have to be looking for the blue smoke to notice it now...before if you let it idle that long you wouldn't be able to see the car inside the smoke. However, we still change the oil in the GTP and in my STE at a little less than 3k. The SSEi usually goes 6-7500 miles between changes, but mostly because of how quickly the miles add up we just don't get a chance until its been that long.

Shawn
dbtk2 is offline   Reply With Quote
Old 10-30-2004, 01:15 AM   #7
Senior Member
Posts like a Camaro
 
Join Date: Aug 2004
Location: Chi-Town
Posts: 1,116
Thanks: 0
Thanked 0 Times in 0 Posts
Boreas is on a distinguished road
Default

I use Mobile 1 on my 93. Seems ok for me.
Boreas is offline   Reply With Quote
Old 10-30-2004, 03:51 AM   #8
Senior Member
True Car Nut
 
Join Date: Nov 2002
Location: Texarkana, Texas
Posts: 6,041
Thanks: 0
Thanked 0 Times in 0 Posts
Damemorder is on a distinguished road
Default

Mobil1 Syn for me. It'* my first oil change with it. Love it so far
Damemorder is offline   Reply With Quote
Old 10-30-2004, 10:55 AM   #9
Senior Member
Posts like a Northstar
 
Join Date: Aug 2002
Location: Toledo, Ohio 2002 SSEi
Posts: 602
Thanks: 0
Thanked 0 Times in 0 Posts
Jstpsntym is on a distinguished road
Default

I switched my Olds to synthetic at 150K miles (after a complete flush). Never used oil or leaked. Prior to that, I got it changed every three months, regardless of milage.

When I got my Bonne, I had the dealer do the change before I picked it up, so it only had about 28 miles on the dino stuff (I still consider it "factory fill" and have the emblem to prove it )

I have been changing my Mobil 1 based on the oil life monitor. It seems to be calibrated to engine hours and run time, so it differentiates between city and highway driving. The most I got on one change was 8600 miles and the oil still looked like honey and was at the full mark. Basically, I pay twice as much for an oil change, but can go at least twice as long between, so it is a wash cost-wise.

Jay
Jstpsntym is offline   Reply With Quote
Old 11-04-2004, 11:25 AM   #10
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Maryland, USA
Posts: 3,089
Thanks: 0
Thanked 0 Times in 0 Posts
95SLE is on a distinguished road
Default

I made the switch to Mobil 1 yesterday. Thanks to all for your advise.
95SLE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Synthetic VS. Regular oils Maymybonnieliveforevr General GM Chat 20 03-13-2007 06:22 PM
Daily Joke - A Million Times Smarter tallbump Lounge 15 12-28-2006 06:07 PM
door panel removal (im sure this has been asked already) c0rsa180 Audio (and aftermarket electronics) 2 02-14-2005 06:57 PM
i know its been asked to death but supercharger on n/a? wild-one Performance, Brainstorming & Tuning 11 09-15-2004 11:58 AM
probley asked a zwillion times Red Baron 1992-1999 3 11-07-2003 03:18 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:19 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.