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Top Tier 87 still pinging/spark knock #4462887
07/18/17 01:41 PM
07/18/17 01:41 PM
Joined: Aug 2011
Posts: 66
texas
kpatter Offline OP
kpatter  Offline OP
Joined: Aug 2011
Posts: 66
texas
2004 Nissan Frontier - 4 cyl - KA24DE engine- 120K

I have been buying Shell 93 for about a year and the truck runs great and doesn't ping during uphill acceleration, but the 93 octane is about 50 cents more/gallon and I have been thinking this is overkill. Last week I filled up with Valero 87 (top tier gas sticker on the pump). Well now the truck is back to pinging under acceleration on hills etc..

I guess I thought the 87 would not ping since it was top tier but it does.
I have seen all over these forums where buying 93 octane is a waste of money for a truk such as mine.

Thoughts?

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462889
07/18/17 01:42 PM
07/18/17 01:42 PM
Joined: Apr 2013
Posts: 2,326
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,326
The Northeast
When's the last time you did a tune up?


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462895
07/18/17 01:47 PM
07/18/17 01:47 PM
Joined: Jun 2015
Posts: 4,225
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,225
New England
Top Tier doesn't affect the octane level, and I guess the 93 is not a waste if it makes your truck run better.
Do you have a mid grade you can try using? Might save you some money compared to 93 and still stop your pinging.


2014 Forester XT, 86000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462897
07/18/17 01:49 PM
07/18/17 01:49 PM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
Higher octane in a car not specified for higher octane is a bandaid fix for spark knock. Your cylinders might have carbon deposits.


too many cars and oil combinations to list in 150 characters or less
Re: Top Tier 87 still pinging/spark knock [Re: Virtus_Probi] #4462901
07/18/17 01:52 PM
07/18/17 01:52 PM
Joined: Aug 2011
Posts: 66
texas
kpatter Offline OP
kpatter  Offline OP
Joined: Aug 2011
Posts: 66
texas
I understand top tier doesn't affect the octane rating - but it does mean better quality gas.. The owners manual does say a little pinging is natural and ok but I hate the sound..

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462902
07/18/17 01:52 PM
07/18/17 01:52 PM
Joined: Nov 2013
Posts: 1,916
Chicago, IL
EdwardC Offline
EdwardC  Offline
Joined: Nov 2013
Posts: 1,916
Chicago, IL
While I agree that you shouldn't need anything higher than 87 octane, there might be something else that needs attention that is causing the pinging. Also, I don't think being Top Tier affects the ping. Maybe there's a bunch of carbon build up?

Re: Top Tier 87 still pinging/spark knock [Re: L_Sludger] #4462903
07/18/17 01:53 PM
07/18/17 01:53 PM
Joined: Aug 2011
Posts: 66
texas
kpatter Offline OP
kpatter  Offline OP
Joined: Aug 2011
Posts: 66
texas
Carbon deposits - I do 99 percent city driving in Dallas. How do I remove the carbon?

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462909
07/18/17 01:59 PM
07/18/17 01:59 PM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
Originally Posted By: kpatter
Carbon deposits - I do 99 percent city driving in Dallas. How do I remove the carbon?

I might get yelled at, but I've used both seafoam and careful distilled water ingestion into the intake to clean up cylinders. The water ingestion method won't leave deposits on your spark plugs but you need to be careful not to suck too much in at one time. You typically do it by attaching a vacuum line to a container with Seafoam or water in it, with the engine warm and running. Let the engine suck up a cup or so, then shut it down for ten minutes. Start it again. Drive it aggressively and enjoy the smoke out of the tailpipe, then repeat until satisfied, and then change your oil if you want to be extra safe. Done.


too many cars and oil combinations to list in 150 characters or less
Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462910
07/18/17 01:59 PM
07/18/17 01:59 PM
Joined: Nov 2013
Posts: 1,916
Chicago, IL
EdwardC Offline
EdwardC  Offline
Joined: Nov 2013
Posts: 1,916
Chicago, IL
Originally Posted By: kpatter
Carbon deposits - I do 99 percent city driving in Dallas. How do I remove the carbon?


You could try slowly dribble in Seafoam or even just plain water into a vacuum line. Check out youtube. A slower approach would be to add a heavy dose of a PEA based cleaner like Techron into the gas.

I think that Top Tier mostly specifies that there are minimum levels of detergent in the gas, not much else about the gas itself.

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462913
07/18/17 02:03 PM
07/18/17 02:03 PM
Joined: Nov 2011
Posts: 4,850
MTL, CANADA
Rolla07 Offline
Rolla07  Offline
Joined: Nov 2011
Posts: 4,850
MTL, CANADA
Id dose it with techron or guaranteed to pass in 2 tanks one after another and see how it does on 87 after. If still no good, try 89 octane and see how it does. Worst case ur stuck using 93. Are u sure its pinging that you hear?


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462916
07/18/17 02:05 PM
07/18/17 02:05 PM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
With all respect, I don't think a cure in a bottle gas additive will fix his problem; it will just erode the deposits in his bank account LOL


too many cars and oil combinations to list in 150 characters or less
Re: Top Tier 87 still pinging/spark knock [Re: L_Sludger] #4462921
07/18/17 02:13 PM
07/18/17 02:13 PM
Joined: Aug 2011
Posts: 66
texas
kpatter Offline OP
kpatter  Offline OP
Joined: Aug 2011
Posts: 66
texas
Below is a copy from the owners manual...


However, now and then you may notice light spark knock for a short time while accelerating or driving uphills .This is not a cause for concern, because you get the greatest fuel benefit when there is light spark knock for a short time under heavy engine load.

Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462923
07/18/17 02:14 PM
07/18/17 02:14 PM
Joined: Dec 2013
Posts: 3,989
Manchester, England
Olas Offline
Olas  Offline
Joined: Dec 2013
Posts: 3,989
Manchester, England
If a drink of water and high octane fuel doesn't stop the ping then check for KR, knock sensor might be on its way out. Manually check timing in case the dizzy or the trigger wheel has slipped.

Otherwise colder plugs, low temp stat, then remap for less advance.


Cable ties should hold it
Re: Top Tier 87 still pinging/spark knock [Re: kpatter] #4462924
07/18/17 02:14 PM
07/18/17 02:14 PM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
Originally Posted By: kpatter
Below is a copy from the owners manual...


However, now and then you may notice light spark knock for a short time while accelerating or driving uphills .This is not a cause for concern, because you get the greatest fuel benefit when there is light spark knock for a short time under heavy engine load.

Sometimes what they say in the owners manual doesn't jive well with extended post-warranty longevity.
What I've learned is that knock causes a shock to the cylinder it occurs in. It damages the conrod and piston of the affected cylinder, damages bearing surfaces, damages head gasket material, and is every last bit of undesirable in a traditional gas motor. It is also distressing to nearby wild rabbits, increases the driver's blood pressure, and can cause a check engine light to appear.


too many cars and oil combinations to list in 150 characters or less
Re: Top Tier 87 still pinging/spark knock [Re: Virtus_Probi] #4462931
07/18/17 02:18 PM
07/18/17 02:18 PM
Joined: Apr 2012
Posts: 9,364
Kendall, FL
wemay Offline
wemay  Offline
Joined: Apr 2012
Posts: 9,364
Kendall, FL
Originally Posted By: Virtus_Probi
Top Tier doesn't affect the octane level...


Exactly


'18 KIA Sportage LX AWD: Mobil Super Synthetic 10w30
'13 Hyundai Santa Fe Sport 2.0T: EDGE 5w30
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