I have an extended warranty on my G and am at the 60k mile service interval. Do I need to have Infiniti do it to keep the warranty or can I just get it done somewhere else and keep the receipts. I've really had it with dealership bullsh1t.

 

You follow the recommended service with fluids and whatever else

 

I bought my G37 used with just under 60K miles and since have hit 60k miles and I have gotten a service engine soon light that has come on like 3 times, is this related to the 60k service interval??

 

No. Go to any autoparts store and have them pull and look up the code for free.

as to the OP, no, you do not need to have dealer service to keep your warranty.