what type of gas do i need for a audi A6 2.8 quattro ?

I have a 94 Audi 100CS, same thing as an A6 except the name, and mine requires at least 91 octane in it. No gas stations around me sell it so I always run 93 octane. Gas costs a little more but its worth it when you're driving that Audi!

Well it is probably not a good Idea to downgrade because In the manual it states that 91 is the minimum allowed in order to prevent the fuel injectors from becoming clogged . If it is a good buy depends on you. If you have a trustworthy mechanic close to where you live and the price is good then there is no other reason not to unless it needs alot of work. I hope I helped

ok its what gets the best mileage with way to find this out is by testing a few brands and types way to do this is by filling up at place you alway stop buy best they have set mileage or writ eit down drive til one need to fil agian buy next type write mileage down one gets you the most miles the one to use at that place then stop at place you sometimes stop do the same not al gas is the same and not all cars are drove the same so its up to driver to know which one gets the best fuel from and only way is to test a few types its like my nissan gets great mileage with shell high octane but gets the same with mobil regular mostly high the octane better the car runs better the mileage but knowing which fuel is best you have to test a few out better to get it where you always stop so one doesnt have to go out of way start with th ehighest ocatne at any places you go to will get you the best you can get then lower octane type wil show up if it dont get better mileage with it you wil see by the miles you drive with one

Premium. I'm german, most of my family and friends drive audis..lol You wanna go lower to safe money, you need to switch to premium every other fill-up

the 2.8 takes at least 91 octane

go with 93 or at least 91

look at the door on the gas filler. look at the gas guage.

look in the owners manual.

the best you can get