^^^ On synthetic, if you're just daily driving, 6000 is what you'd expect on average.

Amsoil or Mobil 1 5W40 Turbo Diesel (for ANY FI Gasoline Engines) FTW.
Royal Purple and Motul 300V are great race oils but break down quickly. IMO, perfect for a track weekend, but I wouldn't run them in typical 3K ~ 5K oil change cycles.

^^^I use Mobil 1 TD for my SRT-4. Works like a charm! :tup:

3000K = Dealer revenue stream
 

bboypuertoroc,

I used to change Spark Plugs, Contact Points and Condenser every 1500 miles in the old days also. But the automotive industry has come along ways in the last 50+ years since I started driving. Toyota for example recommends 5000 miles between changes using regular oil. The Dealers are still hanging onto the 3000 mile thing as a revenue stream and they are trying to convince you to also.
:tiphat:

How old are you? 66? If so, then damn! :driving: Keep on truckin'!!!


Anyway, as technology gets better, the need to maintain something becomes less arduous. Of course, that is if you don't take your vehicle to the limit often. If so, then following a strict and comprehensive maintenance program is key to longevity. Otherwise, just follow your manufacturer's suggestions and you'll be fine.

I use Mobil 1 for My Mercedes c-180k so i think i will use the same in my 370z when i get it

50+
 

Yep..............

My motto since 1960:

'Growing old may be mandatory, but growing up is optional'

2003 Redline Touring 6sp '350Z' (Pre-Ordered 02/02) - Delivered 29 August 02
2008 Radiant Red Toyota 'X-Runner' - Delivered 15 November 2007
2009 Barcelona Red Toyota 'Hybrid' - Delivered 19 August 2008

1957 Chevrolet Belair 2dr post - 'Gas Coupe Drag Car' owned since 1964:driving:
1947 Chevrolet Fleet Master sport coupe - 'Street Rod' owned since 1974
:tiphat:

I think you have a point here. I took an Engines and Powertrains class in college and one thing I learned is that you should stick with the same oil over the lifetime of the automobile. I dont know how true it is but I figure if it helps, even in the slightest, Ill follow the tip. The reason to keep the same oil is because each oil has different detergents and switching them can somehow cause a problem.

Also, when I had my SRT-4, I changed the oil every 3,000 miles on the dime because it was turbocharged and the turbo was oil-cooled. But with an N/A car I think 5000-6000 should definitely be more than sufficient. I actually read online that synthetic oil breaks down a certain amount after 6,000 miles and thats when it performs the best.

I started using royal purple like, 4 years ago. No desire to ever switch to anything else.

rp 3 to 5k and k&n oil filter.

My understanding is, that deposits build up in your engine. Some of those deposits act as a "gasket" on aging vehicles. In spots where original seals may have sprung a leak carbon or coke may build up and actually prevent the leak from being apparent. If you change oils the different properties (detergents, weights, viscosities) may loosen some of those deposits and cause a leak to begin. In a new engine this is obviously less of a concern. I've even heard that you should flush your engine with kerosene before changing oils to clean out any deposits.

I used Castrol GTX in my Speed6; it performed flawlessly. I'm planning on using Castrol Edge in my Z. I still think that 90% of all general knowledge about engine oil (including my own) is myth (flame away).

+1 Royal purple. Some say its a waste of money but many swear by it, and I use it.

Are any of these Ester Oils ?

I change oil often and use one of these....they use them at Mercedes dealerships

Amazon.com: Mityvac 7400 7.3 Liter Fluid Evacuator: Automotive

I own an evacuator like one you reference, but there are caveats as different engines will not allow their use resulting from the oil tube layout. I am hoping, but have not tried yet, that an oil evacuator will work on this engine.

I'm breaking in the engine with the Nissan Ester Oil (which is non-synthetic btw) and will continue using it until 15000 mi. After that I'll use a heavily ester based synthetic oil.

The reason being; this engine likes the abundance of esters but likes conventional oil to allow full break-in. Synthetic might do its job too well and inhibit the "break-in wear" that needs to happen.