I have a G35x (2007) with about 2800 miles on it so far. When is a good time to change the oil? @ 3000? What do you guys use? Synthetic?

 

Has anyone done it themselves? How hard is the filter access?

 

not synthetic yet....use dino oil for now..

 

how soon for synthetic?? the car is aching for m1....

 

i think after 12k or so? after you can use synthetic...and M1 isnt good synthetic..Search on this forum about the m1 oil analysis.

 

ill swear by m1! i was using it in my old car for 5 yrs, engine(internatls) was in new condition, even after 70k miles. why shoudl we wait that long to use synthetic? wouldnt the seals be use to dino oil by then???

 

this was off of mototuneusa.com "Street riding isn't a controlled environment, so most of the mileage may not be in "ring loading mode". Synthetic oil is so slippery that it actually "arrests" the break in process before the rings can seal completely. I've had a few customers who switched to synthetic oil too soon, and the rings never sealed properly no matter how hard they rode. Taking a new engine apart to re - ring it is the last thing anyone wants to do, so I recommend a lot of mileage before switching to synthetic. It's really a "better safe than sorry" situation.

 

i just read that on another forum too....about the rings not sealing. i guess ill use dino oil a coupel times then switch over.

 

well when you switch over to syn...try out german castrol 0w30 if you can find them....

 

The rings seat themselves in the first few hundred miles. You should be good to switch to synthetic after 3750 miles.

Mobil 1 fully synthetic is good oil. If you plan on doing a 15~20k mile drain interval, then you should look at the hyper-expensive oils. If you are sticking with the 5000~7500 interval, Mobil 1 will do just fine.

I have 5000 miles on Mobil 1 in my 4Runner; the color, smell, and feel of the oil is nearly identical to when I first poured it in.

 

Search on the internet for M1 oil analysis, it's by far the best there is on a consistent basis.

 

You can use M1 from day one. It is factory filled in many cars.
The old myths are still around and they are not true

 

Totally agree with this. M1 is a group 3 synthetic. Made from a good base stock, but not the best for extended drain intervals.
To see clear oil after 5K miles is not the norm. Synthetics do very well at suspending dirt, combustion by products, etc in the oil. The dark color indicates that the oil is indeed doing its just by suspending the bad stuff.

 

ok just to be on the safe side of both arguement, first oil change will be with dino oil (i change dino oil at 3k) and after that, ill go with my m1 with 5k intervals. i know how good m1 is. during a valve cover gasket at 70k on my old car (99 a4 1.8tq, chipped since 20k), the intenals were like brand new! no pits, no wear, no black soot, nothign!

 

I have never had any real concrete proof that Synthetic is better than Dino. For the money, I would focus on getting regular dino changes as opposed to using synthetic.


And for those who claim that synthetic oil stays clearer for longer...I never understood the logic. Oils turn dark because they suspend contaminants so you can argue that an oil that turns darker quicker is the better oil (As evidenced by todays dino oil vs old dino oil which didn't have the ability to do so and would cause instant sludge build up).

The G35's engine is definitely a high performance engine, but I don't think it requires synthetic and I don't intend on putting synthetic in it. You should do whatever you think is better, but if you have to come on a msg board and ask about it, odds are you are just wanting to chuck $$$ away.