But, you do not know this to be true. (Not that actual true knowledge or facts are a requirement for posting here. But, the lack of same only confirms the "stupidness" of a number of posters.) It is possible Nissan has included a break-in additive to the Factory fill. Honda, for example, does publicly state this. Nissan, though, is silent on this issue. I have not been able to learn anything about what might or might not be added to the conventional 5W-30 Factory fill. No source has been able to tell me they know for sure one way or the other.

So, if the Factory has included a break-in additive, then you should definitely not drain that oil before 3,750 miles (actually, the "real" number is 6,000 kilometers). And, if they haven't included anything, and they say it's okay to leave it in for 3,750 miles, then what is the harm?

 

Sorry, while I don't have it in front of me right now, I read it carefully a few days when discussing this with an oil company engineer. The 3,750 mile oil change interval is for stop-n-go driving, extreme temperature driving, short trips, towing, etc. The 7,500 mile change interval is for temperate temperature constant speed highway driving.

While some people tend to drive mostly on open highways, I am not one of them. Based on the Service and Maintenance Manual, I should be a 3,750 mile changer (to keep the Factory warranty in effect). As a 3,750 mile changer, pure synthetic might be a waste of money (even in Phoenix summers), and 5W-30 semi-synthetic should be more than okay (at least according to my oil company engineer friend). Also, because the Factory says 5W-30 conventional is acceptable for high heat desert climates, semi-synthetic should provide even better lubrication in temperature extremes and for more miles than conventional.

 

well the only experience i have is the 850 miles on my car right now. But considering i own my own shop and all we work on is japanese and european cars i have a lot of experience working on motors. Again like stated i dont have tons of time with the VQ37 but i do have A lot of experience with VQ motors...

 

well i really could care less what some oil guy says. He didnt design the motor. So his opinion on what oil is best for a motor he knows nothing about means squat to me. Infiniti says not to switch to syn until like 15k miles. You really shouldnt switch any motot to syn before 15k miles because the compounds of each oil are very different. You can destroy the seals by switching to syn.

 

Wow. A little hostile are we? Actually, this engineer is the oil company's liason with manufacturers to make sure his company's products comply with the manufacturers' specific requirements. (You know how BMW, VW/Audi and others have their own oil spec requirements.) So, he has first hand access to the engine developers. You may not want to believe this but his knowledge of pretty much all currently produced engines is first hand. That is his job. He has the detailed internal specs for virtually all currently produced engines.


Actually, while this information has been passed from factory personnel to NNA tech personnel to dealership personnel, it is not official. Infiniti has never made or released any public statement about synthetic oil.

 

So what is the conclusion...First oil change right after 1500 mile break in or at 3750?

 

ok i'm not driving a bmw, vw, or audi.all those cars come from the factory with full synthetic.thats completely different. Its an infiniti. and does not come with synthetic And while i was talking about the g37 its a well known fact not to change oil to syn in a motor that does not come with it before 15k+... any motor

 

I think you don't get it. His job is to make sure his company's oils are acceptable to the manufacturers. That BMW, MBZ, Porsche, VW/Audi, etc. happen to publish their own specs was just an example. Believe me or not, but this man knows more about what oils work best in which engines than anyone, except his counterparts at other oil companies.

Since some engines come with synthetic factory fill, this, obviously can not be a well known fact. Also, since some manufacturers say it is okay to change to synthetic at delivery, again, this can not be a well known fact. Toyota says their engines can all be run on synthetic at any time. They only use conventional as a factory fill for simplicity's sake (and, probably, it saves them money).

I would prefer to discuss, rather than argue with someone who has to be right, so I will leave this post.

 

as i stated you should not switch to syn in motors that dont come with it from the factory. I didnt say anything about ones that comes with full syn already.

 

Yeah they also recommended that we pay around $4k more for our cars too so that can all be profit to them, and do we? NOOOOO

 

I got my oil changed yesterday at 1800km's the dealer I purchased and will be servicing my vehicle said not to switch until 6000km's as there is a special additive in the oil that was in the engine, and will be in the oil change I just had completed.