Petrol / Gas for my MB - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 08-12-2007, 03:18 PM Thread Starter
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Petrol / Gas for my MB

I just bought a CE 230 and it says that the car should have super lead free 98 octane fuel. But in the manual it says you can change to normal 95 lead free is you switch the EZ-KAT switch to N instead of S, which I have done, but what effect will it have besides saving me 20 cents a litre (Norwegian gas prices are $ 2 USD for 1 litre).
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post #2 of 4 (permalink) Old 08-13-2007, 12:38 PM
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Congratulations on your Mercedes!

If the manual says 95 octane lead free gasoline is okay with the N switch activated, I doubt you will notice any significant difference. A lot of people have asked about using gasoline with a less-than-recommeded octane rating, and that is a definite no-no.

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post #3 of 4 (permalink) Old 08-13-2007, 09:47 PM
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At least it should be completely safe to drive with 95 octane gasoline in this case. I believe the noticeable difference (if any) would be minor increase of gas consumption and minor decrease of max engine power. I would assume the difference being so small that it would be difficult to observe.
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post #4 of 4 (permalink) Old 08-14-2007, 09:47 AM
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Hey, raezor.

Setting the switch tells the ECU to restrict certain parameters to accommodate the lower octane. So you're not doing any damage to the engine or fuel system.

You will probably notice a small decrease in fuel economy, although unless you're a true performance driver you won't notice any loss of power. I'd watch the economy issue and if it's significant enough, it may be more cost-effective in the long run to buy the more expensive fuel.

Take care and enjoy the ride,

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