Recent Topics
Advice needed for torque converter fluid
by rodekyll
05/28/17 11:04 PM
Ford WSS-M2C171-F1 spec
by 15SilvyEcotec
05/28/17 10:39 PM
Her dart needs a trans fluid change
by ram_man
05/28/17 10:26 PM
Pennzoil Gold's New Bottle....
by daves87rs
05/28/17 10:05 PM
1999 Camry CE Bosch filter 3600 miles
by Brolly
05/28/17 09:38 PM
MG101-7 Cut Open 5,282 miles
by Brolly
05/28/17 09:23 PM
prestone all makes all models ,and valvaline asian
by rem shooter
05/28/17 09:06 PM
2010 hyunia accent radiator
by rem shooter
05/28/17 08:55 PM
My $300 Score!
by tomcruise
05/28/17 08:53 PM
07' CTS 3.6L Engine Oil 148K Miles
by TX_1821
05/28/17 08:33 PM
What do the T ratings mean?
by SilverFusion2010
05/28/17 08:07 PM
Thought this was funny
by exranger06
05/28/17 07:34 PM
How many use a slide hammer?
by volk06
05/28/17 07:29 PM
Expensive Dealer Oil Change
by Whimsey
05/28/17 07:18 PM
Jeep 4.0 oil change question
by Volv04Life
05/28/17 07:16 PM
Favorite cleaning oil
by SilverFusion2010
05/28/17 07:15 PM
I totally MacGyvered my HHRs door locks for cheap
by eljefino
05/28/17 06:47 PM
Road trip through western U.S.
by VeeDubb
05/28/17 05:45 PM
Motul 8100 X-cess 5W40, 10,521mi, '12 Audi A4 2.0T
by GermanAutohaus
05/28/17 05:37 PM
2017 Coke 600
by bdcardinal
05/28/17 05:32 PM
Newest Members
Bearol, BironDanmum, samanmax, CheskaMacQuinn, Thornhill
61685 Registered Users
Who's Online
22 registered (Char Baby, Bandito440, csx7006, BobsArmory, Atesz792, b1amgm47), 1089 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
61685 Members
66 Forums
265758 Topics
4391874 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 8 1 2 3 4 5 6 7 8 >
Topic Options
#3387762 - 06/03/14 10:48 AM Scotty Kilmer: Don't use MMO!
MileHigh18 Offline


Registered: 09/11/13
Posts: 180
Loc: TN
I usually watch Scotty Kilmer on YouTube, and noticed he commented that you shouldn't use MMO in a modern car because it ruins the catalytic converter. Is there any truth to this?
_________________________
2002 Trailblazer LT 119K
Pennzoil Platinum 5-30

Top
#3387765 - 06/03/14 10:52 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
DB_Cooper Offline


Registered: 10/01/07
Posts: 375
Loc: Ga
No

Top
#3387768 - 06/03/14 10:54 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
Drew99GT Offline


Registered: 10/11/02
Posts: 21790
Loc: Colorado Springs
Huh?

Top
#3387770 - 06/03/14 10:55 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
Realtech214 Offline


Registered: 02/01/13
Posts: 698
Loc: Florida
They cant put anything on the internet that isn't true
_________________________
2015 Silverado Crew Cab 5.3 LT
2001 Suburban LT
- - - - - -
- I NEVER THOUGHT I WOULD LIKE OIL SO MUCH -

Top
#3387774 - 06/03/14 10:59 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
Donald Offline


Registered: 03/21/04
Posts: 18529
Loc: Upstate NY
Unsure if it will ruin the cat, but its snake oil for sure!
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


Top
#3387777 - 06/03/14 11:02 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
Sayjac Offline


Registered: 10/13/08
Posts: 10994
Loc: The Old North State
coffee->> popcorn-->> popcorn2--> Beer2

Top
#3387782 - 06/03/14 11:10 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
Trav Offline


Registered: 11/20/06
Posts: 15912
Loc: MA, Mittelfranken.de
Originally Posted By: MileHigh18
I usually watch Scotty Kilmer on YouTube, and noticed he commented that you shouldn't use MMO in a modern car because it ruins the catalytic converter. Is there any truth to this?

Frank (Demarpaint) has been using this stuff for years and AFAIK hasn't put a cat in anything yet.
Lets not turn this into a snake or or not thread, that always goes downhill fast.
The answer to your question is no it wont ruin the cat when used as directed.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#3387784 - 06/03/14 11:12 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
cwatkin Offline


Registered: 12/04/12
Posts: 32
Loc: MO
I understand that all MMO is really just a diesel or kerosene type product which serves as a good cleaner in engines and fuel systems.

I know several mechanics that will only use this product when flushing out a sludgy engine. Sure, they say that Seafoam and other similar products are better at dissolving sludge. They work too well and break off large pieces all at once where they can clog critical oil passages or get into bearing surfaces and ruin them. MMO is a gentle flush so don't expect it to clean the engine out in one flush. It takes time. Basically you want the sludge out of the engine but getting it out all at once can do more harm than just leaving it be.

Top
#3387786 - 06/03/14 11:14 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
440Magnum Offline


Registered: 02/01/09
Posts: 8570
Loc: Texas
If you use it in the oil- no problem. If you put it in fuel, it does a number of questionable things, such as put a heavier unburned HC load on the catalyst, CAUSE carbon build-up on exhaust valves, lower effective octane, etc. AFAIK, it doesn't have anything that will outright poison a catalyst (tetraethyllead, methyl manganese tricarbonyl, other metallic compounds), but the added HC load doesn't help it.
_________________________
'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP

Top
#3387794 - 06/03/14 11:23 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
exranger06 Offline


Registered: 01/25/08
Posts: 3553
Loc: Guilford, CT
Scotty Kilmer lost a lot of respect from me when he made a video about fixing brake lines and he used a compression fitting. He has also mentioned that he like Lucas products... crush
_________________________
2006 Ford Ranger Sport
1992 Honda Accord EX
1994 Ford Bronco XLT (project)
2014 Subaru XV Crosstrek (wife's)
1999 Ford Explorer XLS (beater project)

Top
#3387808 - 06/03/14 11:41 AM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
zzyzzx Offline


Registered: 05/18/12
Posts: 3887
Loc: Baltimore, Maryland, USA
What's MMO?

Top
#3387814 - 06/03/14 11:45 AM Re: Scotty Kilmer: Don't use MMO! [Re: zzyzzx]
exranger06 Offline


Registered: 01/25/08
Posts: 3553
Loc: Guilford, CT
Originally Posted By: zzyzzx
What's MMO?

Marvel Mystery Oil
_________________________
2006 Ford Ranger Sport
1992 Honda Accord EX
1994 Ford Bronco XLT (project)
2014 Subaru XV Crosstrek (wife's)
1999 Ford Explorer XLS (beater project)

Top
#3387817 - 06/03/14 11:49 AM Re: Scotty Kilmer: Don't use MMO! [Re: exranger06]
01_celica_gt Offline


Registered: 07/29/13
Posts: 1764
Loc: St. Louis, MO
Originally Posted By: exranger06
Originally Posted By: zzyzzx
What's MMO?

Marvel Mystery Oil

dang i just watched the new xmen, they really are everywhere...


Edited by 01_celica_gt (06/03/14 11:49 AM)
_________________________
Red/Black 01 Celica GT 1ZZ-FED(Rebuilt @ 211/144) @ 211/145k
Red 02 Corolla S 1ZZ-FED(Rebuilt @ 140k) @ 141k
All Autos!

Top
#3387826 - 06/03/14 12:04 PM Re: Scotty Kilmer: Don't use MMO! [Re: MileHigh18]
RobertISaar Offline


Registered: 08/21/12
Posts: 144
Loc: Camden, MI, USA
kilmer also recommend dumping in a gallon of acetone(i think) into the fuel to "fix" cat efficiency codes, rather than fixing the actual issue.

Top
#3387843 - 06/03/14 12:22 PM Re: Scotty Kilmer: Don't use MMO! [Re: RobertISaar]
Miller88 Offline


Registered: 04/09/08
Posts: 11979
Loc: Onondaga County
Originally Posted By: RobertISaar
kilmer also recommend dumping in a gallon of acetone(i think) into the fuel to "fix" cat efficiency codes, rather than fixing the actual issue.


That one has been around forever. Along with dumping straight alcohol into the tank of something that can't pass a sniff test.
_________________________
I don't have nice things for a reason

Top
Page 1 of 8 1 2 3 4 5 6 7 8 >