Last post on Dec 04, 2013 at 8:59 AM
You are in the Infiniti G35
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Infiniti G35, Sedan
#2895 of 2937 Re: Fuel Injector Cleaner [to_infiniti]
Oct 19, 2011 (7:00 pm)
First, I am no mechanic and am not mechanically inclined when it comes to automobiles.
May I ask a few questions? What brand of fuel do you use? What does the fuel injection maintenance cost? At what mileage did the CEL come on? Are you the original owner? And how well do you know this mechanic and his experience level?
You were very smart to get the cause of the "check engine light" (CEL) checked out. If the engine threw a code, your mechanic was probably able to retrieve it with a code scanner and diagnose your issue properly. Too many ignore the CEL until disaster stares them in the face, followed by a big repair bill.
Granted, your CEL came on and the mechanic's injector service seems to have rectified the problem. And clogged fuel injectors are not uncommon.
BUT.........in my last 4 vehicles combined, I put on 409,000 miles so far and had only 1 (one) fuel injection service performed. The name brand fuels with the additives have seemed to do the job for me. My 04 G35 Coupe is currently at 46,000 miles, has never had this service, and it runs as strong and as smooth as the day I drove it off the Infinity lot when new. The same can be said for the other 3 vehicles. All 4 have performed at or above the EPA fuel mileage ratings.
So I must ask. What is the benefit of the injector service on a car that is running beautifully? I subscribe to the addage that if it ain't broke, don't fix it. Granted, I follow the prescribed maintenance schedules for the drivetrains on my cars, though I tend to change motor oil sooner than recommended.
If you trust your private mechanic as I do mine (for 18 years), ask him the question......why every 10,000 miles? Infinity does not recommend that frequency of injector service, but I don't have my owners' manual handy to see what the injector cleaning schedule is. My mechanic makes no such fuel injection service recommendation. So I don't do them.
With regard name brand gasoline versus the off brand fuels, they ALL get their gas from the exact same refineries. So it is the exact same gas. The only difference is in the specific additives required by the brand company, and the octane rating (87, 89, 91, 93).
With regard to the mechanic's comment on the alcohol content in the fuel, I think he/you meant the ethanol content.
In Masachusetts where I live, the Winter formulated gas has a mandated ethanol content of 10% per gallon by volume. No one I have asked has been able to confirm that the Summer formulated gasoline has a lower or different ethanol content. And the sticker on the pumps at the gas stations only say: "May contain up to 10% ethanol by volume." The sticker never changes 24/7/365. Ethanol produces less combustible energy than straight gasoline, so the Winter formulated gasolines yield a lower fuel economy, by as much as 10%.
So I might be inclined to use name brand gasolines because of the cleansing additives and skip the fuel injector cleanings, and certainly not every 10,000 miles as your mechanic recommended. I'd have 39 more fuel injection services, and the associated cost, under my belt for no apparent benefit by following your mechanic's recommendation. No thanks.
#2896 of 2937 Re: Fuel Injector Cleaner [pscheid]
Oct 20, 2011 (5:07 am)
I did some reading, and you may want to do the same. Google "fuel injection service" and you will find some informative articles and advertisements. The repair shops push this service, claiming fuel mileage savings and a smoother running engine. The conventional automotive wisdom does not support this service for routine maintenance, only if there is a problem and the cause has been determined to be clogged fuel injectors, and generally from the use of cheap gas that does not necessarily contain detergents.
Other tidbits from my reading......over the counter gasoline additives you pour into your gas tank are not generally considered effective. Pressure-forced, concentrated solvent flushes are the norm if required at about $125 a pop. The detergents found in name brand gasolines keep injectors clean from gasoline varnish buildup on the injectors, the most frequent cause of injector fouling or restriction. Also, the OEMs list the service as recommended but not required.
Using your mechanic's recommended fuel injection service every 10,000 miles would have put me $5,000 in the hole had I ever entertained doing it, with no apparent benefit over the 400K + miles I put on my last 4 vehicles. That is a lot of beer money.
#2897 of 2937 Re: Fuel Injector Cleaner [pscheid]
by MrShift@Edmunds HOST
Oct 20, 2011 (7:22 am)
I would only recommend fuel injector cleaning if the car exhibits systems of injector distress. The only other time injectors might need attention is when they wear out, which they do eventually (they are mechanical in a sense, so....). Sometimes they even rust, although I haven't seen that for a long time time.
#2898 of 2937 Re: Fuel Injector Cleaner [Mr_Shiftright]
Oct 20, 2011 (9:39 am)
They (fuel injectors) do seem to be rather robust nowadays. The only one I have had to touch just happened last month when my '92 Sentra SE-R started running on 3 cylinders. Thought it was a fouled plug at first, but turned out the coil in the #4 injector had developed an intermittent open. Replacing the injector fixed the miss.
#2899 of 2937 Leaking Oil Housing
Dec 31, 2011 (1:03 pm)
I have an 05 g35x w/ 54,600 miles on it. It has been leaking oil of late and I took it in where I had it serviced last thinking a loose seal. They said my oil housing is leaking and that I'll need a new one of those along w/an oil cooler since the dealer said (where they'll get the parts) they are all tied together. This true? Is $555 all-in a fair price? Are there other options I have?
#2900 of 2937 Re: Leaking Oil Housing [pjt6970]
Jan 02, 2012 (2:43 am)
The oil cooler is where the oil filter attaches to the engine block. It is very common for the o-ring to leak, but replacement of the entire cooler is usually not needed; just the o-ring. Should not cost more than $150.
I am a service advisor at an Infiniti dealer and come across this issue on a daily basis.
#2901 of 2937 Re: Maintainence question for 2005 G35 sedan - Help neded [adarshp]
Feb 08, 2012 (9:50 am)
Actually i found that buying a Haynes manual and i little DIY is pretty easy for the 2003 g35 and I was quoted from a Midas almost 600.00 to do a tune up and change the belts. I did it myself with no car knowledge and only spent 130.00 Make sure to get platinum or iridium plugs as the manufactures call for a double platinum iridium plug thats 20.00 a piece they are the best and you will tell a difference also make sure that they are a high temp plug also. If this helped let me know if there is anything else that i may be able to help you with just let me know
#2902 of 2937 Will 2005 hood hit 2003 G35 coupe and parts!!!!!
Feb 08, 2012 (9:52 am)
I'm looking for parts to my 2003 g35 as i have been in love with this car forever and finally got one but the body is really bad and has some bondo on her i have found numerous parts but need to know if they will fit thanks any help at all
#2903 of 2937 Re: Will 2005 hood hit 2003 G35 coupe and parts!!!!! [g35_lover]
by Kirstie@Edmunds HOST
Feb 08, 2012 (10:22 am)
Looks like it will.
If you go to www.car-part.com and put in your year, make, and model, then the part you're looking for, then search all of the US, you will get results for all of the available parts of that type that fit your vehicle.
For example, if you put in the 2003 G35 Sedan instead of the coupe, and search for "hood," you get only a parts list including 2003-2004 model years. This indicates that a 2005 would NOT likely fit the 2003.
If you change it to coupe, you get results for parts from 2003-2007 model years, indicating that any of those should fit the 2003.
#2904 of 2937 Maintenance Plan Options...
Apr 02, 2012 (9:22 am)
Infiniti has Premium, Elite1, and Elite2 Maintenance Plans. Premium “exceeds” what the factory requires and covers additional recommendations. Premium follows the owner's manual under "optional upgrades". Elite1 follows service schedule 1 in the owners manual (oil every 3mo or 3750 miles) and Elite 2 follows service schedule 2 (oil every 6mo or 7500 miles), both Elite 1&2 “meet” the factory requirements and cover the intermediate and major service every 15k and 30k miles. So my question is do you think the Premium (costs more of course) is worth it?
Also, are any of these plans worth it at all? How much are you paying without them?