Tony Wirtel wrote: > I "mix" to get 89 or better octane at lower cost. In my area, > regular, mid and premium are about 4.09, 4.29 and 4.42, respectively. > If the pricing was applied linearly, 89 would not be 4.29 but instead > about 4.20 instead. Saves about $2/tank and takes less than two > minutes more time.
The two stations I buy from charge 10c and 8c per grade. I buy my premium from the station that charges 8c. Right now, it's 3.999, 4.079, and 4.159 there. I suspect a 50/50 mix would rate above 89 octane when mixing 87 with 93. I'll keep putting in 40-50% premium until it starts to ping or until the premium in the tank drops to 50%. If I'm still not pinging at 50%, I'll start filling with 1/3 premium. _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
