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Old 02-12-2012, 12:35 AM   #1
rgrafton
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Default recommended spark plug

could someone provide the part number of the NGK copper spark plug that is recommended for my 1998 Saturn SW SOHC

i don't mind spending some money as well if there are some better copper spark plugs that are out there... I see these NGK V-power ones, but not sure if they are in the "recommended spark plug list"

...
1994 Saturn SL SOHC 5speed w/130k miles on engine (250k+ miles on car, tranny...etc.)

9/23/2012:currently running Amsoil Signature Series 5w30 (uncle gets an awesome deal so I figure I'd try it)

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Old 02-12-2012, 03:33 AM   #2
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Default Re: recommended spark plug

Quote:
Originally Posted by rgrafton View Post
could someone provide the part number of the NGK copper spark plug that is recommended for my 1998 Saturn SW SOHC
You want the BKR5ESA-11 (aka 5643)

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Old 02-12-2012, 04:08 AM   #3
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Default Re: recommended spark plug

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Originally Posted by Chazberry View Post
You want the BKR5ESA-11 (aka 5643)
CORRECTION - make that BKR4ESA-11 (aka 7755)

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Old 02-12-2012, 04:31 AM   #4
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Default Re: recommended spark plug

NGK Stock #5643 is for the BKR5ESA-11 for the DOHC plugs

NGK Stock #7755 is for the BKR4ESA-11 for the SOHC plugs

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Old 02-12-2012, 10:24 AM   #5
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Default Re: recommended spark plug

Quote:
Originally Posted by rgrafton View Post
could someone provide the part number of the NGK copper spark plug that is recommended for my 1998 Saturn SW SOHC

i don't mind spending some money as well if there are some better copper spark plugs that are out there... I see these NGK V-power ones, but not sure if they are in the "recommended spark plug list"
Quite a few people use the V power plug as well. I'm running the Denso plugs in our SOHC, and there are a number of users running other brands as well. I know some members run Champion plugs, but not sure if any of them have the SOHC engines.

The NGK numbers get tossed around as they were OEM in some cars, but you can use a variety of different plugs if you want. Other than avoiding the fine wire platinum plugs that some have had issues with, you probably won't notice much of a difference brand to brand.

On this forum often the "recommended" list is simply a part number that got repeated 20,000 times and is thus taken as the best and/or only valid part. Keep in mind that saying something 20,000 times doesn't always make it correct. I've seen posts over and over that say NGK was the OEM plug on my car. Being I pulled AC Delco plugs out, and the representative that works at NGK agrees that AC Delco was still making their own plugs at that time, I tend to think it's just incorrect information being repeated until most people take it as facts.

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Old 02-12-2012, 10:43 AM   #6
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Default Re: recommended spark plug

Here is the list from Denso...

http://www.globaldenso.com/cgi-bin/g...&action=search

Two questions...
First - why do the plugs numbers change at 99's?

Second - what is the best plug type? I am assuming the Iridium (first column), but y'all are smarter than me...

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Old 02-12-2012, 02:10 PM   #7
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Default Re: recommended spark plug

I have no idea why the designations changed at '99 plugs. It looks as though all the part numbers might have just changed, but it could be a physical change as well. I got the old part number plugs not that long ago, so it could be something recent.

As for "best" that could be debated for years. I use the standard plugs and they provide good life in this car. The single cammers are so easy to change plugs on that I personally don't see much benefit even if another plug type does give longer life. People wishing to lengthen maintenance intervals might benefit from a double platinum or irridium plug.

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Old 02-12-2012, 02:35 PM   #8
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Default Re: recommended spark plug

The number is different because Denso decided that you should be using thier super double platinum plug.

Stick with the NGK BKR5ESA-11 or BKR4ESA-11 and you will be fine.

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Old 02-12-2012, 02:39 PM   #9
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Default Re: recommended spark plug

All plug manufacturers are changing over to a stock number system instead of the letter-number system that has existed since the first sparkplug. Seems computers are too dumb to deal with a random collection of letters and numbers that may not be quite unique across brands. For example several manufactures have had a plug marked A-6 but they are far from the same physically or electrically.

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Old 02-12-2012, 02:50 PM   #10
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Default Re: recommended spark plug

Quote:
Originally Posted by OldNuc View Post
The number is different because Denso decided that you should be using thier super double platinum plug.
The letter/number designation changed for all plug types. You should look at the link before deciding there is a sinister motive.

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Old 02-12-2012, 03:00 PM   #11
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Default Re: recommended spark plug

I actually did...jerk

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Old 02-12-2012, 03:05 PM   #12
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Default Re: recommended spark plug

Every manufacturer is revising their nomenclature for data access reasons.

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Old 02-12-2012, 03:24 PM   #13
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Default Re: recommended spark plug

Quote:
Originally Posted by OldNuc View Post
I actually did...jerk
Amazing how you could actually click the link and look at it, yet come up to two statements that obviously don't apply.

Quote:
Originally Posted by OldNuc View Post
The number is different because Denso decided that you should be using thier super double platinum plug.

Stick with the NGK BKR5ESA-11 or BKR4ESA-11 and you will be fine.
The above suggests they are leading a person to a certain plug type, when in reality they changed their part letter/number designations on all plug types.


Quote:
Originally Posted by OldNuc View Post
All plug manufacturers are changing over to a stock number system instead of the letter-number system that has existed since the first sparkplug. Seems computers are too dumb to deal with a random collection of letters and numbers that may not be quite unique across brands. For example several manufactures have had a plug marked A-6 but they are far from the same physically or electrically.
Once again, if you actually look at the link you can see that they changed both stock numbers and the letter/number designation. And there is still a change in plug types beyond a certain year.



As for the "jerk" thing, if you want to reduce yourself to kid stuff because I'm entitled to an opinion, go right ahead. Maybe you should post your cute little troll picture next.

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Old 02-12-2012, 03:31 PM   #14
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Default Re: recommended spark plug



Keep on Trolln troll.

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Old 02-12-2012, 03:32 PM   #15
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Default Re: recommended spark plug

just wondering because 2 years ago i went to ACDelco 41-808 platinum plugs ($7.00 each/ the "BEST" option according to AdvanceAuto's computer) I've heard the stock copper plugs are best so I think I'm going to go with the NGK 7755..

they come up as Nickel Plugs with copper core... Is this right?

do you think I'm alright with the ACDelco or should I go ahead and switch to the coppers and be done with it. I am trying to diagnose why I've been getting 28mpg highway. I've heard I shoudl be getting mid 30s

...
1994 Saturn SL SOHC 5speed w/130k miles on engine (250k+ miles on car, tranny...etc.)

9/23/2012:currently running Amsoil Signature Series 5w30 (uncle gets an awesome deal so I figure I'd try it)

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Old 02-12-2012, 03:45 PM   #16
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Default Re: recommended spark plug

i have used AC delco plugs before. but switched to nascar double platinum s/plugs made by AutoLite i personally think there better in the sense that engine performance and starting can be felt over the other ones sorry i dont
no the part # because i usually look up the # when i go in the store to buy them

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Old 02-12-2012, 03:47 PM   #17
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Default Re: recommended spark plug

Quote:
Originally Posted by rgrafton View Post
just wondering because 2 years ago i went to ACDelco 41-808 platinum plugs ($7.00 each/ the "BEST" option according to AdvanceAuto's computer) I've heard the stock copper plugs are best so I think I'm going to go with the NGK 7755..

they come up as Nickel Plugs with copper core... Is this right?

do you think I'm alright with the ACDelco or should I go ahead and switch to the coppers and be done with it. I am trying to diagnose why I've been getting 28mpg highway. I've heard I shoudl be getting mid 30s
All the "standard" plugs are nickel plugs. That is the correct plug number if you want to go the standard NGKs.

Many of the parts place system will try to guide you to the more expensive plugs. Some claim longer life with them, others say it doesn't matter. Several people including myself have run "standard" plugs for 50,000 plus miles without problem, so I don't see any value in the more expensive plugs myself.

So regular NGK, V Power, Denso regular, Autolite regular, AC Delco regular, Champion regular.... you get the picture. All of them will work fine. I don't know if any other regular members have used the AC Delco platinums, so getting feedback on that particular plug might be harder than with some others.

A number of people have had issues with the single platinum plugs as well as the fine wire platinum plugs and in the case of the later especially Bosch platinum fine wires.

If you do a search for posts by NGKtech he lists a number of companies that made OEM plugs for these cars. Any of them were good enough to ship in the cars, so they should remain just as good later in life.

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Old 02-12-2012, 04:01 PM   #18
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Default Re: recommended spark plug

rgrafton,

Here is one of the posts I was looking for.

http://www.saturnfans.com/forums/sho...&postcount=258

The poster actually works for NGK and has answered some tech support issue questions from people on this forum in the past. I'd personally consider his input as the best "horses mouth" we have on the forum in regards to plugs and the NGK plugs in particular.

He also clarifies the copper vs nickel statement towards the end of that post.

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Old 02-12-2012, 05:37 PM   #19
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Default Re: recommended spark plug

Quote:
Originally Posted by rgrafton View Post
just wondering because 2 years ago i went to ACDelco 41-808 platinum plugs ($7.00 each/ the "BEST" option according to AdvanceAuto's computer) I've heard the stock copper plugs are best so I think I'm going to go with the NGK 7755..

they come up as Nickel Plugs with copper core... Is this right?

do you think I'm alright with the ACDelco or should I go ahead and switch to the coppers and be done with it. I am trying to diagnose why I've been getting 28mpg highway. I've heard I shoudl be getting mid 30s
the words platinum & saturn don't mix at all.

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Old 02-12-2012, 05:45 PM   #20
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Default Re: recommended spark plug

Could it be because of the engine changes in the 1999 + model years?

From Wikipedia,

"1999 models received improvements to both SOHC and DOHC engines that did not affect power output, but did smooth out some of the harshness associated with them. These changes included revised pistons, connecting rods, crankshaft counterweights, etc. Fuel economy of these refined models also saw a measurable improvement."

http://en.wikipedia.org/wiki/Saturn_S-Series

I have a 98 Sl2 , it runs a little rougher than my Dads 2000 SL2, but it feels like it has more power.

Has anyone swapped a .605 MP2 5th gear into a 1999+ SL2?

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