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Just put on LTH's, then you don't have to worry about failing cats :)

well it's not the cats.it got down on the interstate tonight and all i can say is.this car baffles the hell out of me :ugh2:

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The blue stuff comes with new cars. Even the dealer uses the green stuff.

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The dealerships are supposed to use the blue stuff in our cars during maintenance. It's called "Blue - Long Life" on the side of the bottle.

Maybe that's all this problem is. A bunch of bad thermostats. Anyone else (DIGI?) care to try this?

Interesting....my dealer used the green on the 30k maintenance (flush radiator). Radiator temp on the cluster has never reached an alarming range...just the same never trust the gauge, testing the thermostat like kenny did is more sound.

I will try this....

Q: a lot of guys are using Redline WaterWetter, would this be a good additive to the blue coolant from dealer?

Red Line Synthetic Oil - WaterWetter® Coolant Additives - WaterWetter®

I just flushed the coolant system twice the past few months... pretty exhausted at the moment lol. The car is at the dealer almost once a month for little things... next is seat belts.

I am hoping it is the thermostat. Please note that that I had this dreaded gas pedal delay 'early in the morning after driving about 5 miles'. I left the house in the morning, drove 5 miles to the gas station, filled up and when I tried to make a right turn, the car just sat there for seconds (felt like forever).

And just to refocus, the gas pedal delay is "separate" from the lethargic/sluggish performance when the temperature is hot. I believe I solved this issue when I installed Modshack's oil cooler setup.

I thought you can just hit the paddles and it will go into manual mode for a bit?

Tbh going into manual mode and downshifting is much faster than flooring it in D.when you choose the gear you want to be in, its instant power opposed to waiting for the car to downshift than getting the power.

Oh and you make it sound like its a pain to drive a MT, all I have to do is press the clutch and shift into a gear lower than overdrive(I usually shift into 4th) and I have my power lol.

Kenny I would think if the coolant is hot as hell going in to the radiator, and cool coming out, I would say that shows the radiator is doing its job? Either that or there is low flow, but that is probably not a radiator issue (but could be the thermostat)? Anyway I think the thermostat thing is very interesting. Was your replacement a Nissan part? What temp are they specced at?

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I haven't been here in a while, but I added the 34 row cooler from Z1, oil temps now run no hotter than 200, even on 110+ days and the car still does this. Absolutely mind boggling how Nissan can let this go. Its a serious safety issue...several times I have punched it to enter traffic etc and the car has fallen on its face.