My wife is on her 3rd Mercedes. The first two were totaled, but not her fault, she walked away safe because it was a Mercedes.

Now she drives a 2003 E320 and since times are getting tough, she wants to save a few dollars and use the mid range or regular sometimes. She thinks it would be OK, but I disagree. She thinks I don't always know it all. (Ha)

So to solve her questions I'm thinking about using reg or midrange gas with an Octane booster, like the Gumout brand. She gets her way and so do I.

It only $2.24 at walmart and would cost half as much a the 93 octane per tank. If Mercedes wants at least 91 octane in the gas we could use a booster with mid-range gas cheaper yet keep the octane up near the suggested rating.

What say You?

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1998 Land Rover Range Rover 66K Miles
1988 300SE Totaled in 1998, hit by drunk driver, but we walked away OK
1989 420SEL 140,000, just warming up. Total by 18 wheel gas truck rear ended, but refused to lose another MB. Had it repaired cost $10,000+ Great Car again SOLD it for a 2003 C320 to save on gas
1991 2500 Suburban 454, 130,000, Best truck in the world. SOLD it out right.
1952 8N Tractor 1,000,000-/+