Does anyone use these products? I just dropped a bottle of 108+ in my fuel tank and notice the car does pull harder. What are the Pro's and Con's of this product?

GC

 

The manual says not to use all those additives stuff

 

that stuff wears out engine seals quicker from what I hear....

 

downside? needing your injectors rebuilt or new ones. - not cheap! even the Nissan approved additive is supposed to be heavily diluted from what I was told. Like 1/4 to 1/2 what is specifed on the bottle.

 

Since the engine uses it's most "aggressive" spark timing with 91 octane fuel, there's really nothing to be gained by going any higher. The only exception might be if you're driving in extremely hot conditions (i.e. death valley)

Plus, most of the ones sold in auto parts stores will send you shopping for a new fuel injection system.