I use NGK... it's the same 1/16 turn instructions on my Suzuki outboard (also NGK) and I use the same method of 1/4 -1/2 turn. Been good with those over 6 or 7 changes.
I however replaced mine with motorcraft and do not have pinging anymore but still run 91 octane as 93 isn’t common in socal.
I was told that the Motorcraft iridium's are made by NGK?
I opted for the NGK DIFR6D13, since these were suggested by a local Honda dealership. These seem to be perfectly fine for the CR-Z. No complaints at all.
I've been running the NGK "rs7" plugs 06K905601M in my wagon since I went IS20 with an APR stage 3 91 tune. Stock gap out of the box was .026. I've now put about 6k on them and have had zero issues.
I have NGK ruthenium’s and it is noticeably smoother at idle vs iridium’s. Literally zero idle “pop” or misfires
NGK Iridium gapped at 0.026 only. They’re great
I drive a 01 4runner and I run NGK plugs and wires. Almost 300k on the dash.
Has anyone tried the Motorcraft SP594 plugs? They supercede from the SP542, which is said to be a 1 step colder plug for our cars. Currently running NGK 6510s but i think i got a "fake" set as i paid like $30 from Amazon for them. The SP594s I can get for $41 from Ford... so anyone have good results?
I unknowingly sourced (6) NGK ILZKR7A Spark Plugs a year ago from eBay and installed them at 60K miles on my 3.6 VR6. I found out last week that the plugs were fakes. About a month ago I started getting random misfires. After detailing the issue in this thread here: https://forums.vwvortex.com/showthr...VR6-Cyl-2-Misfire-When-Taking-Off-Quick-From-Stop-Suggestions&highlight=Misfire I pulled the spark plugs and checked them last month and noted the gap was pretty far out of spec (weird for only being a year in), so I gapped them and reinstalled and the problem went a way for a few weeks. Last week I had another misfire, so I chalked it up to a bad batch of spark plugs and resigned to buy and install a new set.
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