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Old 04-13-2005, 12:30 PM   #11
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I just recently bought Mobile 1 synthetic with the 15,000 mile guarantee. Of course there are stipulations as to what may decrease this life of the oil.

Are we to assume, but the estimation on this article that it won't last a normal driver the 15K miles that it claims?

Granted, I will need to change my filter at least once in the middle(or more if a cheaper filter).

I have gone 5-6K miles each time with the regular M1, and it has been fine as far as I can tell.
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Old 04-13-2005, 02:44 PM   #12
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Quote:
Originally Posted by kevo
I just recently bought Mobile 1 synthetic with the 15,000 mile guarantee. Of course there are stipulations as to what may decrease this life of the oil.

Are we to assume, but the estimation on this article that it won't last a normal driver the 15K miles that it claims?

Granted, I will need to change my filter at least once in the middle(or more if a cheaper filter).

I have gone 5-6K miles each time with the regular M1, and it has been fine as far as I can tell.
Quote:
Originally Posted by jestal
It is interesting that the new Mobil 1 "extended service" oils added more ZDP to the oil to prevent depletion of the anti-wear additive to market the extended drain intervals to 15,000. BUT....read the bottle. It specifically states that if your engine is under warranty, change the oil at the specified intervals...hmmm....so much for their "guaranteed 15,000 mile interval. Another gem on the bottle is the statement that "if your engine has an oil life monitor follow the oil life monitor and do not use the extended drain interval." .
Not that it won't last 15K. Mobil will not honor its gaurantee if you change your oil longer than the car manufacturer says to change your oil.
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Old 04-13-2005, 06:48 PM   #13
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I always change @ 3K miles despite using Mobil 1, AC filter and oil life systems, not worth it otherwise.
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Old 04-13-2005, 07:01 PM   #14
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I don't know about you guys, But I'm almost anal about oil changes and keeping the car tuned...

I know people that are simmilar and have cars at 300,000 miles that still run great... He has never neglected an oil change...

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Old 04-13-2005, 07:44 PM   #15
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Quote:
Originally Posted by jr's3800
I don't know about you guys, But I'm almost anal about oil changes and keeping the car tuned...

I know people that are simmilar and have cars at 300,000 miles that still run great... He has never neglected an oil change...
I'm the exact same way. And I don't use synthetic!

My theory is that if you simply take care of the engine by changing the oil and not beating on it constantly that it'll run a very long time.
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Old 04-13-2005, 08:39 PM   #16
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That article seems like a little bit of BS, to me. My car had Mobil one from 35k->110k. If you look at my engine [neglected, oil changes from 110->150k using shitty oil and shitty filter], she'* still real nice, and sludge-less everywhere. Not a single oil leak, nothing. Pistons look like they seal just fine in there. Now, of course the cross-hatch [from honing] is gone.. but what do you expect from a car with 150k? Betcha any money every little bit of CR the car started with, is still there. I don't care what some person [who'* credibility is unknown] says. I go with hard evidence. Graphs, Tables, conclusions, the works. I want to see these tests. And the few I have seen, all say Synthetic is worth it. Remember that oil test on the new Camaro that had Mobil One for like 20k? Well, they had hard evidence of the chemical make-up of the oil. And although I am not a chemist, nor do I know what all that **** is.. he has the evidence to back up his findings.

Once my car is driven more than a few hundred miles on an oil change, Mobil One will go in her. My dad has been working on cars since he was 14 [built his first engine at 15]. Now being 43, if he says something is good, I think he is a trustworthy person, don't you think? He uses Mobil one in each and every vehicle he has. From his $4,000 Suburban, to his $60,000 Escalade. Everything gets Mobil One. 200k on the Suburban. 6.5L Turbo Diesel STILL peels out just like she did new. And no one-wheel wonder.. the sucker has an LSD, stock.

Just my opinion. No amount of convincing will convert me to Dino Juice. And following the scheduled maintenance is mandatory.. going past it is your own risk, but with Mobil One, I wouldn't feel the least bit worried about going 10,000 miles. I'd change the oil by then.. just because my baby deserves that.. probably every 5k.


-justin
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Old 04-13-2005, 08:59 PM   #17
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Don't get so animated Justin...LOL

You will have good results with synthetic... When you are done the top end will be nice and tight and happy...

But at the same time I will tell you that the 3800 Vin C was designed to be a low friction engine... These engines are not hard on the oil, and the ctlinder walls will look great with next to nothing for wear... I saw a 200,000 mile 3800 that looked like the cylinder bores were new... It was a neglected engine and still looked good..

But I do like synthetics... But even then I would still be anal about the oil changes... If I buy Mobil 1, I try to get it on sale in the 5qt containers... I usually get 5 or 6 containers...

My lawn mower even gets the synthetic treatment...

Even regular oil changes ( dino ) will go a long way in terms of wear on an engine...

BTW, in the past I have been told it was a real problem to switch to synthetic in an older engine... I have used it several times in my 91 Bonnie now with not 1 single issue... At one point the oil was in there for 9 months.. It still wasn't dark and it was full...

Good luck to all

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Old 04-13-2005, 10:17 PM   #18
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Since I do alot of HWY mileage I was changing the oil once a month ( every 5,000 KMS, wich is about 3,000 miles). I then went to synthetic once I thought my new engine was broken in enough. Also since am on the HWY alot, according to my owners manual ( GM) they say I can go 12,000 kms between oil changes with HWY mileage.

So I decided that I would go Mobil 1 synthetic, ( I also use it in the Bonneville). I will 10,000kms between changes on the Malibu. I have checked it at about 5-6,000 kms and someone from one of my accounts was outside. I asked him "how old do you think this oil is" he thought it was brand new, I told him it had 5-6,000 kms on it, he couldn't believe it. Now I know it is all HWY mileage but still, I find a difference, I change my oil every 2 months or 10,000 kms.
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Old 04-13-2005, 10:32 PM   #19
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Mike,

I believe that the synthetic is a big help to the 3100 engine parked under your hood... The 3100 have had problems for a long time... All of your pistons should have the teflon coated skirts to help avoid piston scuffing or piston slapp... All 3100'* and 3400'* have this issue... And I'm sure the 3500 does as well... I feel that the synthetic can help these engines live a long long life... I know people with these engines that have used nothing but Dino... And their cars still run great... With all of the traveling you do I would have done the same and let the engine break in and switched to synthetic oil... It is great protection for the amount of driving that you do.. And we know you need and want the car to last a long time...

If I could afford to use synthetic at every oil change I would.... But I change my oil frequently due to my driving habbits and inner city driving most of the time...

I will agree with everyone that the synthetic is a superior oil..

On another note we had a Honda Accord a long time ago, and we used Mobil 1 in it.... That car would for some reason never turn the oil black... The oil always came out looking like it did when it went in... Had to be one of the cleanest engines I have ever seen... We had a ford with a 2.9 before that... 1000 miles and the oil was black and 1 quart was missing... The honda never burned a drop...

Also, a family member has a Montanna with the 3400, it too keeps the oil as clean as could be... Even after 3000 miles the oil still looks like honey( 1/4 qt missing )

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Old 04-14-2005, 01:57 AM   #20
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I don't think anyone on here said that syntheitc wasn't better than conventional, just that the benefits might not be as incredible as some companies make out.
As for the 15,000-mile synthetics, when you put that many miles on an oil change, the filter becomes the big worry. The oil could certainly handle it, but if your filter goes bad, you're screwed. Best to stick to the 3,000-5,000 miles between oil changes that the car manufacturer recommends.

And I definitely agree that Mobil1 is good stuff, and now that I've gotten one oil-change at the dealer(just to get everything checked), I'll be switching over to Mobil Clean High Mileage.
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