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Old 01-29-2005, 03:32 AM   #1
RalliArt16
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Default Internal Engine Cleaning

Hey all, tomorrow i figured I'd "cleanse" the inside of my engine, by this i mean:

I will do a standard oil change but refill it with 1 quart of MMO and 4 quarts of Full Synthetic Mobil 1, seeing as how synthetic "cleans" the enigne. This is the first time i wlll be running full syn.

With this said, how long should i run it before the next oil change? if this stuff is gonna loosen up all the gunk i know i don't wanna run it with this stuff in the system for long. 500 miles? 1000 miles?

thanks.
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Old 01-29-2005, 05:39 AM   #2
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Default Re: Internal Engine Cleaning

Mobil1 itself will do a pretty good cleaning job. Just change it at a normal interval. Mobil1 has been known to last 5k-10k miles is many cars depending on your driving.

I like using a product called Auto-RX. I have used it in my saturn and it got a lot of junk out of the engine.

more info at:
http://www.auto-rx.com/
many pleased users at this "Bob is the oil guy" forum: http://theoildrop.server101.com/ubb/ultimatebb.php

Pic of my saturn oil.
http://theoildrop.server101.com/cgi/...c;f=5;t=002762

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Old 01-29-2005, 12:01 PM   #3
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by RalliArt16
Hey all, tomorrow i figured I'd "cleanse" the inside of my engine, by this i mean:

I will do a standard oil change but refill it with 1 quart of MMO and 4 quarts of Full Synthetic Mobil 1, seeing as how synthetic "cleans" the enigne. This is the first time i wlll be running full syn.

With this said, how long should i run it before the next oil change? if this stuff is gonna loosen up all the gunk i know i don't wanna run it with this stuff in the system for long. 500 miles? 1000 miles?

thanks.
The engine is supposed to hold 4 quarts, so you're going to be 1 quart high. Not good.
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Old 01-29-2005, 06:16 PM   #4
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Default Re: Internal Engine Cleaning

Since most S-series Saturns burn a little oil. Why not add the quart of MMO prior to the oil change? Run it for another week (at least a couple hundred miles) and then change the oil over to strictly Mobil 1.

Just an idea.

Paul.
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Old 01-29-2005, 07:02 PM   #5
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by RalliArt16
Hey all, tomorrow i figured I'd "cleanse" the inside of my engine, by this i mean:

I will do a standard oil change but refill it with 1 quart of MMO and 4 quarts of Full Synthetic Mobil 1, seeing as how synthetic "cleans" the enigne. This is the first time i wlll be running full syn.

With this said, how long should i run it before the next oil change? if this stuff is gonna loosen up all the gunk i know i don't wanna run it with this stuff in the system for long. 500 miles? 1000 miles?

thanks.
Quote:
The engine is supposed to hold 4 quarts, so you're going to be 1 quart high. Not good.
Yeah I was thinking the same thing. A friend of mine ran his car with a little too much oil(I wanna say like 3 quarts) and it didn't turn out too great.
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Old 01-29-2005, 07:27 PM   #6
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Default Re: Internal Engine Cleaning

Where's Wolfman when you need him???

Seriously, you MAY be able to run ok with 1/2 quart overfill, but a full quart is not a good thing to do. Too much oil can cause excessive frothing and aeration of the oil which can actually reduce lubrication efficiency and worsen oil consumption.

Better to check your oil at every fill of gas if you have an oil user.

I'd agree with the Mobil 1 cleaning gunk out of the engine all by itself. I converted my 99SL2 at 62,500 and the the first change was done early because the M1 got dirty unusually fast. The second fill of M1 was normal. The third fill remained clean longer still.

I don't think I'd run a full quart of MMO for an entire 2,500 or 3,000 mile change interval due to its relatively thin viscosity. Maybe put in a half quart or a quart (if there's room to do so) 500 miles or so before you change it would be a better approach?
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Old 01-29-2005, 09:15 PM   #7
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Default Re: Internal Engine Cleaning

I think I actually responded to a similiar post a few weeks (months?) back.

DOHC (Has OIL BAFFLE PLATE) can be run "safely" up to 1 quart over full.
SOHC (NO OIL BAFFLE PLATE) 1/2 to 3/4 MAX before you will get issues like foaming and increased burn off.

There is also a fairly extensive post about oil additives....If you want to add about 12oz or so of MMO to help clean things out before the next oil change, it will help, BUT I would not leave it in there for more than 250-500 miles or so MAX.
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Old 01-29-2005, 10:04 PM   #8
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Default Re: Internal Engine Cleaning

Quote:
Better to check your oil at every fill of gas if you have an oil user.
Gee Wolfman, I set you up for your signature line... but alas you didn't bite!
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Old 01-30-2005, 12:38 PM   #9
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by wolfman
DOHC (Has OIL BAFFLE PLATE) can be run "safely" up to 1 quart over full.
I agree, but there's no benefit from running 1 quart high, especially when he's planning to dump the oil within 500-1000 miles. Why throw away a full quart of Mobil 1 for no good reason?
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Old 01-30-2005, 02:12 PM   #10
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Default Re: Internal Engine Cleaning

LOL my bad everyone.. didn't mean to get attacked by making an error and saying i was gonna run 5 quarts I just add oil up to the FULL line on the dipstick... and i just assumed this was 5 quarts like the typical engine
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Old 01-30-2005, 06:50 PM   #11
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by RalliArt16
LOL my bad everyone.. didn't mean to get attacked by making an error and saying i was gonna run 5 quarts I just add oil up to the FULL line on the dipstick... and i just assumed this was 5 quarts like the typical engine
Nobody attacked you.
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Old 01-30-2005, 08:18 PM   #12
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by RalliArt16
... and i just assumed this was 5 quarts like the typical engine
Ah, but that's the thing; 5 quarts isn't "typical". EVERY four-banger I've owned or worked on has called for 4 quarts of oil. But yeah, in decades passed, it seemed like EVERY engine, from a little 200 I-6 in a Maverick to a 383 Chrysler, took 5 quarts.
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Old 01-30-2005, 09:16 PM   #13
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Default Re: Internal Engine Cleaning

the Ecotec 2.2 is a 5 quart engine
the Trailblazer 4.2 six has 7 quarts
more oil is good......if the engine is designed for it.

as far as internal cleaning, over on www.bobistheoilguy.com they seem pretty sold on a product called AutoRX
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Old 01-30-2005, 10:45 PM   #14
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Default Re: Internal Engine Cleaning

I will only chime in to say that while Auto-Rx appears to work, it is expensive, and I am somewhat wary of a product that as part of it's instructions tells you to essentially keep buying it and pouring it in basically forever....
...
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Old 01-31-2005, 03:39 AM   #15
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Default Re: Internal Engine Cleaning

Quote:
Originally Posted by wolfman
I will only chime in to say that while Auto-Rx appears to work, it is expensive, and I am somewhat wary of a product that as part of it's instructions tells you to essentially keep buying it and pouring it in basically forever....
Yes it's expensive but, I am a believer now. A lot of nasty stuff came out of my Saturn. Not much came out of my integra though Both cars run noticeable better especially the integra. The saturn hardly burns oil anymore. Before it would burn 1qt every 3K.

I think one treatment is enough. The second treatment just puts money in their pocket.
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