After taking my own oil to the Infiniti dealership today, all I can say is...........0W40 Mobile One!

Most dealerships will put in the 10W30 Mobile One, but the 0W40 is the stuff to get! It's a little more expensive but it is well worth it.

This car drives alot more smoothly now!

 

I hate to break the news to you, but it is all in your head.

 

Crap, and I thought it really seemed smoother! No, actually it really is smoother. I didn't say faster.......I said smoother.

 

Are you saying the synthetic isn't worth it at all or are you talking about the difference between 10W30 and 0W40?

Just curious.

I've always used synthetic in my car. I just bought the G35 about a month and a half ago. Now, it DEFINITELY seems smoother.

However, some people may not see the difference.

Depends on how in tune you are with your car.

I still think most will notice it (if they really drive their cars......not just cruising on the highway).

 

[QUOTE=jnkirk1974]Are you saying the synthetic isn't worth it at all or are you talking about the difference between 10W30 and 0W40?

No, I think synthetic oil is good stuff. I just don't think anyone could tell the difference in 10W30 and 0W40, from driving the car. I don't think you could tell the difference in 10W30 regular oil and 0W40 synthetic either.

I do think syntheitc oil is better and your engine will probably last longer, but don't believe you could tell the difference in driving it after an oil change. By the way, I currently own a 2004 M3 and that car comes from the factory with synthetic, so you can see I do use the stuff.

I had a Mercedes SLK 320 several years ago that came with regular oil from factory. Mercedes then started using synthetic and put synthetic oil in the car at the first oil change covered by their mainteance plan that was included with purchase of their cars at the time. I certainly could not tell any difference in the car when I left the service department. Maybe you can, but I sure couldn't.

 

0W-40 just flows better when it's cold. It acts like a 0W when the temp is below 40 degrees. When it heats up, it acts as 40W for better protection.

Same thing goes for 5W-30 and 10W-30.

0W gives less protection then the more viscous weights. I myself stick to 5W-30 M1. Some track cars run single weight 50W since they don't encounter frequent cold starts. However, heavier weights can rob some performance and fuel economy. The heavier it is, the "thicker" the oil. This means the crank/internals have more resistance with the oil.

 

Your car will feel smoothly after each and every oil change/maintenance..

 

Maybe if you have left the oil in for 20,000 miles.