Gas for the S5
03-08-2011, 12:41 PM
#11
AudiWorld Member
+1 Note Audi's Top Tier( http://www.toptiergas.com/retailers.html) recommended gasoline vendors, due to their better detergents and hence lessening of carbon deposits.
I've used Shell and Mobil for years.
I've used Shell and Mobil for years.
As for using Mobil "for years" - unfortunately Exxon/Mobil wasn't on the top tier list until relatively recently ...
03-09-2011, 02:46 AM
#13
AudiWorld Super User
As already noted, the ECU will auto-retard the timing so no problems with using 89, other than losing some performance.
You bought a luxury sports coupe - give it the fuel it deserves (or trade it in on a Corolla).
Mobil gasoline was one of the first with a detergent, but their assimilation by Exxon kept them off the list until recently.
You bought a luxury sports coupe - give it the fuel it deserves (or trade it in on a Corolla).
Mobil gasoline was one of the first with a detergent, but their assimilation by Exxon kept them off the list until recently.
03-09-2011, 03:02 AM
#14
AudiWorld Super User
....and reduced fuel economy offseting the perceived savings at the pump. It's all a wash in the end.
Compression ratios are high today, combustion chambers are designed around a higher octane fuel to obtain all the power from these modest displacement engines.
03-11-2011, 10:22 AM
#15
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