I've run my na for over 3 years - first owner outside of Japan - and it's never been in a garage. So, it's never been tuned whilst in my ownership. So the question is, how do I know it's running at peak performance?

 

It goes ok, returns good mpg figures - or not if you drive it hard, just passed the emissions test of the MOT with flying colours (thanks Lymon), and I change the filters annually, oil twice a year, plugs twice since I've owned it and that's about it.

 

What do I have to do to make sure that it's performing as it should - without taking it to one of our friendly specialists...

 

...any thoughts would be appreciated.

 

cheerz

 

Jack

You are doing everything you can.

 

How many miles do you do? Most people who own Zs change the oil every 3000-6000 miles. Most people do it the at the lower end of that range. But if you do less miles than that changing it every 6 months is a good habbit

 

What plugs do you use? Do you use proper Nissan ones? If so, they are good for 50,000 miles so you dont have to change them that often.

 

The best way to see if your car is performing well is to work out its MPG. If the engine is slightly out of tune the MPG will suffer. Slight problems can effect the power but will also effect the MPG so this is a good way to find if it is running as it should.

 

You sould try to time a 0-60 time and see if it roughty what the spec says.

 

Other than that there is little you can do. If you car sounds good, runs smooth and getting respectable MPG, its most probably running well.

 

Stuart

Stuart

 

...I do about 18k miles a year in it (it's NA) - and regularly get 32+ mpg on a run (A12 and M25). Plugs are Iridiums - changed them from Platinum tipped - can't say they are any better or worse. Oil (fully synthetic) about twice a year (no turbos remember).

 

...I'll try the 0 to 60 and see what it can do.

 

many thanks

 

Jack