I would like to know Audi recommends that we use 91 octane rated fuel
But we have a Knock sensor that Advances and retards timing according
to driving conditions and load on the engine to avoid Pinging and Detonation
So If I had to use say 89 wouldnt the engine adapte to the fuel and adjust itself ?
I guess I would get less power but wat other problems would I get by use a less rated fuel?

 

Well, yes it would. It would retard the timing as much as it could to prevent knock. This would decrease power and mileage. And the system can only retard the system so much. Is saving a dollar on each tank worth it?

 

dont risk it, use 91

 

if u dont use 91 it will also gove u dirty injectors (depending on where u got it from). My audi mechanic said that it would be stupid not to use 91 b/c the cost of fixing anything that broke would be more than the money u saved.

 

Im not planning on use it
I was wandering wat would be the result ....
Losss of power is something I cant give up hehe

 

94 is on sale down the street from my house. On tuesdays it's the same price as 93.

 

dude you are driving a $50,000 car from new i'm pretty sure if you can afford the car you can afford anothe 10 cents a litre BTW i live in Canada so that price is Canadian dollars and we sell gas buy the litre not the gallon

 

good point

 

Read your owner's manual.

 

www.gasbuddy.com