i've never owned a german car, do i put 100% put 93 grade gas in it? can someone explain the difference and benefits?

Generally higher octane gas is obviously better, and some even go further with some additives like V-power from shell etc.

I wouldn't bother with it unless #racekar...

I usually run either 93 pump unless it's a track day. The track near me they sell a sweet 104 octane. I have to use it with my 104 ECU file (can switch between 91, 93, 100 and 104) otherwise I get knock and the performance goes down when using the wrong file and missmatched octane.

But in your case with a C300 you should be completely fine using the lower ones. Specially if you will sell the car in few years anyway...

what does it say on the gas cap? lol. Might as well put what the manufacturer recommends in it... if you're buying a benzo don't jew out on gas for a few cents

Run diesel bro.



Octane rating pertains to heat/knock resistance. Higher performance, especially forced induction, vehicles usually require higher octanes to compensate for increased temperatures created due to either boost, or high compression.


EDIT: Nah....That's all I'm going to write about that.


It's in the manual; Read the damn manual.

This post was edited by OldAndyAndTheSea on Feb 29 2016 06:36pm

if it says premium you have to use 91 or higher.

or risk your car blowing up, the choice is yours friend

i will use 93! can't risk anything thank you guys.

100% vouch this.

Truck runs sooo much better on diesel. I'll never put gas in it again!

dont run higher octane if your car needs low grade..

E85 or gtfo

Well considering octane is resistance to detonation i guess the actual important question is WHAT DOES THE MANUAL SAY

If its not a high compression motor your literally wasting money on a higher octane fuel as you wont get complete combustion if your car doesn't need 93 octane


This post was edited by TanKiE on Mar 1 2016 09:00am