I can run regular fuel in my Honda that has 269,000 miles on it, (since it's a Honda, and can take it).....but it's premium for my Benz.

I suppose it's just a matter of preference, like keeping my Artic white 300E clean versus driving it while dirty (which won't hapen , because I have cleaning supplies in the trunk!

Remember what the little sticker at the gas cap states? "Premium unleaded fuel only".......at least that's what my sticker states on my 300E.

Good luck whatever fuel you run....but take it from me, you should consider removing the fuel tank and cleaning the rust out of it! .....(no matter what fuel you choose).

Glad to hear that you can run 87 octane Duke.....but for me, 87 means my year model...lol!

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'87 300E | 2.6 engine
Artic White - Navy blue interior, chrome rims, very clean and sharp!
91 300E
89 300E


The rest of my collection are just cars and trucks...no more "automobiles"...