Recent Topics
Similar Stand but cheaper
by CB900F2
07/22/17 07:00 AM
Mil paper - high temperature lubricant evaluations
by Shannow
07/22/17 05:08 AM
Neglected 2006 Altima 225k catching up maintenance
by BigPoppa
07/22/17 12:01 AM
duplicate, please delete
by BigPoppa
07/21/17 11:57 PM
echo srm-210 misfires and dies after 20 minutes
by motor_oil_madman
07/21/17 11:18 PM
Mopar Guys! '76 truck w 318 & A833 manual.. TIPS?
by SumpChump
07/21/17 10:53 PM
Best bluetooth speaker?
by OVERKILL
07/21/17 10:07 PM
Non paying customers!!
by motor_oil_madman
07/21/17 09:37 PM
My 4Runner reached a milestone today
by FlyNavyP3
07/21/17 09:24 PM
Need to soften interior leather that has hardened
by OilSwag
07/21/17 09:17 PM
Review Michelin Defender LTX M/S 10,000 mi 8months
by FlyNavyP3
07/21/17 08:59 PM
Dumb question I've been thinking about a while
by NStuart
07/21/17 08:33 PM
Fram Pro Syn Users
by bandz7
07/21/17 08:24 PM
Fram TG's $3.00
by dlundblad
07/21/17 07:17 PM
HF 22 HP vertical, $549.99 until 08/01/17
by Kruse
07/21/17 07:00 PM
Which Oil is Better? Blackstone looks at brands...
by Daverino
07/21/17 06:04 PM
credit card fraud - any ideas?
by 04SE
07/21/17 05:36 PM
Blown Oil Seal After Converting Back From HM Oil
by Astro_Guy
07/21/17 05:13 PM
Shell Rotella CJ-4 15w40 Syn-Blend
by Rock_Hudstone
07/21/17 05:13 PM
MicroGreen filter
by FlyingTexan
07/21/17 04:13 PM
Newest Members
JayBB, TUCCI, SuperSporty, Youresioure, mr2magic
62244 Registered Users
Who's Online
59 registered (4WD, AZjeff, 2003f7, Astro_Guy, alex_at, 6 invisible), 1798 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
62244 Members
66 Forums
268322 Topics
4441920 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4331523 - 02/16/17 09:55 PM fuel system cleaners - too hot for spark plugs?
NissanMaxima Offline


Registered: 10/21/15
Posts: 118
Loc: co
Hi all:

When I bought my new Maxima back in 1995, I asked my master Nissan mechanic at the dealership where I bought it about periodic use of fuel system or fuel injector cleaners. He said to never use them because they make spark plugs run way too hot for my VQ30DE aluminum engine. Did cleaners back them have ingredients that would lend any truth to this statement? Recently I wrote to the distributor for BG44k and they said that some cleaners are alcohol based and can affect engine temperature but the BG44K will not overheat the aluminum block.

So, my questions are:
1. is it true that some cleaners do contain alcohol and if so, do they in fact cause engines to run hot - validating what my mechanic told me 22 years ago? I have scoured the internet on this topic to no avail.
2. is it true that BG44K will not cause dangerous heating? What other cleaners would not cause excessive heating?
3. I have never run any sort of cleaner through my engine. It has 67k miles on it so obviously has not been driven a lot. I have not noticed any issues such as hesitation, stalling, etc. but would it be a good idea based on the fact that the car sits at times without being run to use a fuel system cleaner? The BG44K distributor says that top tier gas (which I always use) has a short shelf life and that I've probably run a lot of oxidized and/or separated gas through my car.
4. based on your answers to (3), should I just run a can of fuel system cleaner or seek out one of these induction services? If cleaner, any preference for what I've heard are the two top regarded cleaners, BG44K or Chevron Techron? From what I've read, Chevron developed the PEA based cleaner so I'm inclined to give that a try.

Again, no current issues with the car (other than noted horsepower loss after moving to Colorado many years ago from an elevation near sea level where I bought the car new). I have always heeded this mechanic's advice because the last thing I want to do is harm the engine. (Of course the owner's manual says cleaners are not recommended but I've seen this in every manual for every car I've owned.) In fact, the car is finally due to for its first spark plug change and I don't want them to get so hot with any sort of cleaner that they would be difficult to remove! My current Nissan mechanic here in Colorado says no problem with using a cleaner so I really don't know who is right.


Top
#4331533 - 02/16/17 10:06 PM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
Reddy45 Offline


Registered: 08/15/08
Posts: 1545
Loc: USA
You've done everything right and there are no problems. You don't need to add fuel system cleaner into the equation.

You can add it if you want, but based on your assessment, it would just be a waste of money.
_________________________
2015 Toyota Tacoma V6 4X4

Top
#4331547 - 02/16/17 10:23 PM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
OneEyeJack Offline


Registered: 09/14/10
Posts: 6458
Loc: S California
Doesn't Top Tier gasoline have "cleaners" in the mix?

I've never heard that a PEA causes heat or ignition problems. Am I missing something, here?

Top
#4331556 - 02/16/17 10:33 PM Re: fuel system cleaners - too hot for spark plugs? [Re: OneEyeJack]
NissanMaxima Offline


Registered: 10/21/15
Posts: 118
Loc: co
OneEyeJack...I may have confused you. My original mechanic never said anything about what ingredient could actually cause overheating. The BG44k said alcohol based cleaners can apparently do this, but said the BG44k doesn't cause overheating because apparently no alcohol in the BG44k.

What the BG44k distributor told me about oxidized fuel concerned me and then I saw a video on youtube which claims to demonstrate carbon formation when burning oxidized gas (simulated by mixing gas with acid). So I don't know if I have these carbon deposits now, or if they are cleaned when I run fresh gas, or if it even matters if I'm not really experiencing any issues (unless a cleaner might restore some performance that has been so incrementally lost over the years I haven't even noticed). It is a bit difficult to judge performance because when I lived near sea level the car would accelerate very quickly (Motor Trend car of the year in 1995 with 0-60 tested at 6.1 sec as I recall) but now in Colorado at over a mile high, the performance is not what it used to be by a long shot. I'm sure most of it is probably the elevation and thin air, but again, could some performance loss be carbon deposit related?


Top
#4331630 - 02/17/17 02:01 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
GMBoy Offline


Registered: 11/22/04
Posts: 7364
Loc: Texas
There's 10% alcohol in your gas now and that is much more than a single bottle of fuel cleaner will introduce to your tank. I don't agree with the mechanic and mechanics are not always the know it alls but more opinion alls.

Top
#4331669 - 02/17/17 05:53 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
Linctex Offline


Registered: 12/31/16
Posts: 1829
Loc: Waco, TX
Originally Posted By: NissanMaxima
My current Nissan mechanic here in Colorado says no problem with using a cleaner so I really don't know who is right.


Your current Colorado mechanic is correct.

The other one listens to old wive's tales.

Top
#4331693 - 02/17/17 06:52 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
Donald Offline


Registered: 03/21/04
Posts: 18880
Loc: Upstate NY
Use a PEA cleaner as per the directions and you will be fine.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


Top
#4331735 - 02/17/17 07:57 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
LeakySeals Offline


Registered: 02/18/11
Posts: 5989
Loc: Hudson, NH
What kind of alcohol? Ethanol in gas? Isopropyl alcohol in Seafoam? Or Methanol found in fuel cleaners from the 80's, banned because it was found to dissolve and corrode aluminum?
_________________________
06 Escalade 6.0L AWD 147k. Edge EP FTG
03 Maxima 3.5L Unknown miles supertech 10w30

Top
#4331777 - 02/17/17 08:47 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 10987
Loc: N.H, U.S.A.
My nissan truck from the 90s had wrong heat range plugs (Like NGK #5). Too Hot. Just for idle emissions - [censored] part throttle load heating. Go to a Recessed electrode and a cooler heat range.

I find engine run poorly with the cleaner in them and then run better after its gone thru with the next tank.

Don't run a cleaner. Decent gas has all you need maybe MORE than you need.
_________________________
2014 Nissan Rogue S CVT, OC#7 29472mi-QSUD 10W30 + M1 110A Filter; 2017 Subaru Crosstrek CVT 4762mi-SOA 0w20 + SOA Filter

Top
#4331825 - 02/17/17 09:35 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
HerrStig Offline


Registered: 08/24/11
Posts: 9273
Loc: Boston, MA
One reason alcohol was used in race engines was because of the cooling effect (heat of vaporization).

Top
#4331856 - 02/17/17 10:04 AM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
Olas Offline


Registered: 12/11/13
Posts: 3638
Loc: Manchester, England
Occasional cleaners can't hurt but aren't proven to do huge amounts of good, either. Air density makes a difference, but was your sea level fuel pure or e10? That variable will shed more light on elevation.
But no, your spark plugs won't be affected.
_________________________
1982 VW Scirocco
1457cc
98 bhp
78000 miles
Redline fluids
Mann/Mahle filters

Top
#4332249 - 02/17/17 05:43 PM Re: fuel system cleaners - too hot for spark plugs? [Re: HerrStig]
Linctex Offline


Registered: 12/31/16
Posts: 1829
Loc: Waco, TX
Originally Posted By: HerrStig
One reason alcohol was used in race engines was because of the cooling effect (heat of vaporization).


Yes, but ONLY when running 100% alcohol, & it was methanol at that. The A/F ratio has to be like 7:1 when running methanol!

What I don't like with "modern engines" with oxygen sensors is that they "over-compensate" when alcohol is in the gas. If you have E-30 in the tank, your gas mileage is cut in half. Not sure why engines run so darn rich when running alcohol blends.

Top
#4335304 - 02/20/17 09:00 PM Re: fuel system cleaners - too hot for spark plugs? [Re: NissanMaxima]
NissanMaxima Offline


Registered: 10/21/15
Posts: 118
Loc: co
Thanks all: Saw a Chris Fix video on YouTube where he tested Chevron Techron and did two treatments back to back and even ran the second treatment with no gas dilution. His borescope showed little to no difference in before and after treatment on the cylinders. Some folks in the comments pointed out it primarily is supposed to clean fuel injectors, but according to the label, he was expecting a more dramatic cleanup of the cylinders. I guess I was a bit disappointed. Maybe I'll just stick with running my Shell Nitro 91 and try and run the car more often. Thanks for all the input.

Top