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Old 01-21-2005, 07:48 PM   #1
mr. ed
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Default Yes, Another Oil Question

Just a quick question. I use Mobil 1 synthetic 5W-30 in my 2000 SL2 (82,500 miles). I notice that printed on the bottle are the words "new engine formula". Obviously, my engine isn't "new". I've been using this oil for a number of years now. Is there any reason to switch now that the engine has relatively high mileage or should I just ignore the print on the bottle? The car runs well and doesn't use much oil between changes. Thanks...
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Old 01-21-2005, 09:43 PM   #2
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Default Re: Yes, Another Oil Question

Quote:
Originally Posted by mr. ed
Just a quick question. I use Mobil 1 synthetic 5W-30 in my 2000 SL2 (82,500 miles). I notice that printed on the bottle are the words "new engine formula". Obviously, my engine isn't "new". I've been using this oil for a number of years now. Is there any reason to switch now that the engine has relatively high mileage or should I just ignore the print on the bottle? The car runs well and doesn't use much oil between changes. Thanks...
i don't think you'll have much of a problem. mobil 1 is the cadillac of motor oils. and, since you've been using it since the engine was fairly new, i don't think you should change now (unless you're poor, like me). i'm not an expert, but i would think it would be highly unlikely for mobil 1 to jack up a motor. even a high-mileage one...


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Old 01-21-2005, 11:29 PM   #3
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Default Re: Yes, Another Oil Question

I *think* the reason 5w-30 says "new engine formula" is because of its low viscosity. Lower viscosity = easier to get past worn seals, etc... I'm pretty sure Mobil 1 10w-30 says "high mileage formula" on the bottom... Unless you live in really cold weather... go with 10w-30.
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Old 01-22-2005, 07:30 PM   #4
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Default Re: Yes, Another Oil Question

Thanks for the replies, guys. I see there are two different opinions. Since I'm having no apparent problems with the 5W-30, should there really be any reason to change? If enough of you experts agree that I should go to 10W-30, I'll do that. I live in So. Calif., so cold weather is not an issue.
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Old 01-22-2005, 07:47 PM   #5
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Default Re: Yes, Another Oil Question

If you visit the Mobil 1 website, select the "Which Oil For My Car?" link, and input your make, model, year, and engine type, you'll find the following information...

You Chose The Following Vehicle:
Make: Saturn
Model: SL2
Year: 2000
Engine: L4-116 1.9L DOHC VIN 7 MFI

0W-30 Below -20° F
You can use Mobil 1® with SuperSyn™ 0W-30 with confidence.

10W-30 Above 19° F
You can use Mobil 1® with SuperSyn™ 10W-30 with confidence. This viscosity is also available in Mobil Drive Clean Oil™ and Mobil Drive Clean Plus™ High Mileage formula.

5W-30 All temps
You can use Mobil 1® with SuperSyn™ 5W-30 with confidence. This viscosity is also available in Mobil Drive Clean Oil™ and Mobil Drive Clean Plus™ – both the Newer Vehicle and High Mileage formulas.


Here are the summary product descriptions for Mobil 1 5W-30 and 10W-30

Mobil 1 5W-30
Mobil 1 10W-30

Last edited by Razorbak; 01-22-2005 at 07:54 PM.
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Old 01-23-2005, 05:19 AM   #6
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Default Re: Yes, Another Oil Question

"this is a job for SUPERBOB" at www.bobistheoilguy.com
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Old 01-23-2005, 05:22 PM   #7
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Default Re: Yes, Another Oil Question

do u have to do some kind of prep i u wanna switch from a regular oil to full synthetic?
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Old 01-23-2005, 05:43 PM   #8
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Default Re: Yes, Another Oil Question

Quote:
Originally Posted by SimPlyxTriPPiN
do u have to do some kind of prep i u wanna switch from a regular oil to full synthetic?
No, you don't. Synthetic motor oil is FULLY compatible with standard (dino) oil. They can mix with no harm. Thats exactly what Synthetic blend oils are.. a mix of the two.
However, when draining your oil i would suggest letting it sit overnight or a longer time than usual to get all that nasty dino oil out before you go Synthetic
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Old 01-23-2005, 05:47 PM   #9
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Default Re: Yes, Another Oil Question

The "newer engine" marketing speak is simply because most "newer" (read: post 1990) engines required 5w30. It's like excedrin migrane having the same stuff as regular excedrin. Castrol GTX used to market itself as "for today's smaller cars". Something to remember when you're standing in the aisle at K-Mart.

One might argue that it's the wear and tear that makes an engine not "newer" anymore. That's valid. But I wouldn't switch from the recommended grades (as razorbak posted) until it's really driving you nuts: burning through a lot, etc.
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Old 01-26-2005, 07:29 AM   #10
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Default Re: Yes, Another Oil Question

does it burn as much as regular oil? if it does, is it still worth the money since i have to add another quart every 750-1000 miles?
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Old 01-26-2005, 12:42 PM   #11
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Default Re: Yes, Another Oil Question

I get about the same consumption no matter what basestock or viscosity I run. But yours may be different; experiment.
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Old 01-26-2005, 10:50 PM   #12
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Default Re: Yes, Another Oil Question

if i put full sysnthetic oil in my car next oil change and i just add regular oil to top it off if it's low in oil, would this a smart move? or just stick with the conventional oil?
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Old 01-29-2005, 05:56 AM   #13
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Default Re: Yes, Another Oil Question

anybody?
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Old 01-29-2005, 12:03 PM   #14
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Default Re: Yes, Another Oil Question

Why would you go to the trouble and expense of filling with synthetic, and then topping off in the interim with conventional oil? Trying to get rid of some excess dino inventory? It won't hurt anything, but it will marginally dilute the synthetic oil used in the original fill. Nothing noticeable, probably. I just don't understand the logic. Kinda like buying a sports car, and then filling the tank with regular unleaded to save a buck.
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Old 01-29-2005, 01:16 PM   #15
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Default Re: Yes, Another Oil Question

Yes, you could top off with regular oil. Why waste M1 if you add it then dump it out 1000 miles later? In fact, why waste M1 on an oil burner? Note that you should try it because I know you're curious and see if it cuts your consumption; The 0w40 weight is stout and good to try for that. But if it turns out to not help, top off with dino.

It'd be cheaper, if the above experiment leaves you still burning, and you want a semi-synthetic, to get a boatload of motorcraft synthetic blend for $1.52/qt at Walmart and use it for both the filling and topping off. Hurry, they appear to be dropping the brand/line.
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