I just brought my 07 G35s back into the dealership after getting my transmission oil changed (6MT) for having difficulty shifting gears after getting the transmission service done. As soon as I sat down my adviser mentioned they put a heavier weight oil in by mistake.

My question is, will this have any long term issues with the syncro's or Transmission? I have driven roughly 500 miles with the wrong oil.

 

I would assume the transmission got worn out faster then usual. Did they do you any courtesy by at least looking at the transmission afterwards?

 

I say you take it back and have them fix it

 

Assuming you weren't experiencing massive gear clash/grind while the thicker oil was in (just sticky and cumbersome shifting), and if it's working properly after swapping in the proper thinner oil, then I would say NO, I don't think you'll have to be concerned.

I can appreciate how irritating it must be, but I seriously doubt in the long run you'll notice any slight wear difference caused by the mixup.

 

whs.....^

 

500 miles of "normal" driving shouldn't have hurt anything, but keep an eye on it for leaks and abnormal behavior. Plus, start searching for a better service center

 

You will be fine. But i wouldnt be going back to that stealership.

 

I would go back. They made a mistake and they need to fix the problem on there dime

 

i thought infiniti&nissan dealers will use nissan ATF for everything,how do they use different oil? they put gear oil in it instead?

 

Not everyone drives an automatic.

 

^ ATF is and stands for Automatic Transmission Fluid

 

how stupid it is for the dealer to put mtf or gear oil into atf, lol. they must been drunk.

 

Uhmm....Guys, as I read the OP's post, he's says he's got a 6MT. Where are you all getting this whole ATF issue from?