I had one repair shop tell me I should only use Nissan plugs because the autolites I bought "don't work" and didn't want to put them in.

Another shop told me I should only use Nissan D-matic transmision fluid. My manual says I should only use Nissan D-matic but two sentences later it says I can use Dextron III on my 2001 X.

Thoughts?

Was this a repair shop, or a dealership service center?

Thoughts?

OK -

Nissan's typically like NGK's for example, as NGK makes the OEM plugs, etc...but the autolite's might be the wrong range or something to say they won't work, otherwise, a spark plug is pretty straightforward.

As for lubes's, sure - there's the factory fill, or approved equivalent, such as mentioned.

Also - If you have something on your mind, why do you have to get it off your chest?

Thoughts?

If you have something on your mind, why do you have to get it off your chest?

Because its not good to go around with that weight on your shoulders.

Yeah, it can make your heart heavy.

I'm a nissan tech and have seen a lot of problems with spark plugs other than Nissan or NKG causing poor fuel mileage and performance. The OE plugs are good for 100,000 miles so I would spend a few extra bucks and get those.
As far as the ATF, we use Nissan fluid for warranty repairs but for other services and repairs we use Dexron. The two fluids are almost exactly the same and you can save a few bucks.

They were both repair shops. Is it a good idea to replace the spark plug wires at the same time I replace the plugs too?

Yes.

:D

PS - the #6 plug is tricky...its all the way behind the engine, between the engine and firewall...most shops will leave it in, but act like they did all 6 plugs.

Sigh....I've been reading up on the difficulty of replacing #6. I'm definitely not looking forward to it.

The secret is to pay attention when you REMOVE the plug...feel down where it is, while the wire's still attached/boot's on the plug...and judge the depth down and the angle the hole will be, etc.

The lateral orientation is easier, as there are guide pins for the tiny holes in the spark plug boots...and the one's you can see, are directly in line with what you can't see...aiming you perfectly as long as you know the depth.

:D