i got a 2001 maxima 20th se anniversary edition it's do for a oil change what oil should i used reg. 10w40 oil or sythetic 10w40 oil and when should i keep changing it at 3000 or 3500 miles filter too please help? and by the way the car has 30,600 miles.

 

Why 10w40? Nissan "prefers" 5w30. Are you in a warmer climate?

I run synthetic and plan to change both oil and filter at 5,000, but the oil could probably go longer.

 

10w40 will provide no better wear protection over 5w30. Stick with what Nissan recommends.

 

i just purchased the car a month ago?

 

What are you trying to say here? We're asking 'why 10w40?' and your answer doesn't make sense.

The advice given still does, though

 

 

ok.... synth 5w30, conventional wisdom is you can switch to synth at your mileage. I'm using mobil 1 and changing oil and filter at 5k miles. That might be conservative but that's what I'm doing.

 

say you're using 10w 30 could you go back to 5w 30?

 

yep

 

Nissan recommends 5W-30 because that's the weight oil they used when they were designing the engine and that way you'll get the best performance out of your engine. I use 5W-30.

 

Synthetic 0W-30 and 5W-30 are what I would look at in this engine. 10W-30 would be okay as well. 10W-40 is not necessary at all and should be avoided.

 

Depends on the climate. In Arizona, I only use 10w30. 5w30 would be okay, but 10w30 is better for higher temps.