Sean Kennedy writes: > Hi, > > I am the proud owner of a 2 week old A4 1.8Q. > > When I bought it I looked in the owners manual and it said it can take > fuel with an octane rating of 87. > > When I went to fill up for the first time the back of the gas door said > 91 octane. I think the manual says 91 is recommended, but that 87 is usuable with reduced performance. Jeff