Harbor Freight has the torque wrench you’d need for $19.99 the Pittsburgh 3/8" drive and a 3/8" drive extension set for $16.99. I’d also grab a magnetic spark plug socket from AutoZone for $14.99 (just go straight for the magnetic one, it makes life way easier).
For the spark plugs themselves, I’d stick with NGK, but make sure it’s the correct spec for your car, since they make different cx5's, some being NA and some being turbo.
As for the "paste," some people put antiseize or dielectric grease on the threads to make future removal easier. I personally skip it because I want zero chance of anything getting into the engine, plus grease can amplify the torque applied with the wrench, which is bad. I’m hoping this is what you mean by paste?
If you do it yourself, the first time costs roughly $100-120 for the tools, and still is about half of what the dealer is quoting. After that, you just pay for the spark plugs themselves for future changes, which brings the cost down to around $50-70 per change since now you'll have the tools.
Get an icon click type torque wrench from harbor freight when they have a sale. And a deep socket set for spark plugs plus dont buy your plugs on Amazon. Go to rockauto. And buy them there buy ngks also rediitt has a rockauto sub and usually people give out 5%off coupons. Also Do not use cheap aftermarket plugs on your car also you'll need a regular ratcheting wrench and extension. Never use torque wrench to loosen plugs it csn destroy the calibration
NGK Laser Iridiums will last longer, but those aren't bad per se.
I had to put a new spark plug in mine after only a few hours of use. It had some China branded in it and I switched to NGK. Also propane creates a hard harder to jump spark gap so you generally have to narrow the gap a tiny bit from typical specs when you’re going to run propane. Since I only run propane I went down a little on the gap and it runs flawlessly. I optimize the gap width by seeing which widths responded best to a sudden surge load without hesitating.
NGK Lazer Iridium Plugs is what I got to replace them in my car. I believe those are what Mazda OEM plugs are, but it’s just cheaper to buy the NGKs from a part store.
use NGK spark plugs, the best ones are the PFR6Q
Pick up some genuine Audi R8 Red-Top coils (not kidding, much lower failure rate) and some fresh NGK Iridium spark plugs.
That price at 63.5k miles isn't bad imo. I spent roughly that same amount for my 2017 back in 2019 with around 40k miles (64k km). What's the service history look like? Have spark plugs been replaced, belts checked, engine oil changed at least 10-12 times by now? How are the pads and rotors?
Get rid of those ASAP. These are prone to breaking their ground straps. Myself and many many others have fell victim to this.
My brand new out-the-box WEN 3500 would barely start until I tossed the Torch and replaced it with an NGK. It now runs as designed. Too many others have had similar issues and that's why Torch is widely regarded as junk.
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