Hi all!!!

I was wondering if it is safe to use 100 octane premium gas on a european S2000???


Thanx...

 

I think what you should be asking is, "Is it a waste?"
You can always use a higher octane than recommended "safely" but you can't always use a lower octane "safely".

 

yes it's safe.

however, i would not be using it unless you were running at the track or something. our cars have an almost paranoid sense of knocking and tend to pull timing on even a stock S2000 on 93 octane gas. a few horsepower could possibly be gained just by using high octane fuel.

but again, if you're not running it at the track, don't waste your money for a "couple" extra horses.

 

Remember, guys. If he is in Europe, he is talking 100 Research Octane, not R+M/2 like us. He is probably talking 94 to 95 in our system but I am guessing on that one. Can you folks outside North America chime in?

ZaX: What does your owners manual recommend?

 

The rice gas here in cali is dangerous. Even at 76 it still contains MTBE which poisons the ground water.

That being said, there were some interesting observations. Runs done at nite under similar conditions, 4th gear pull, logging from ODB2 output.

91 octane ---> 29-30 degrees timing
100 octane ---> 27-28 degrees timing

very interesting indeed.

 

We have:
Diesel of course
95
98
and new 100

its been here for two weeks or so and it has the same price as the 98...

Owners manual says 98...

 

Should have keyed in on this. He should have been better to post this question up in the European forum instead of here (which is mainly N. American type of octane rating).

 

In that case, the best rule of thumb is to meet the manufacturer's recommended octane rating for the fuel. I don't think that there is enough difference between the 100 and 98 to make any real difference. Now, if you live in a region where you feel there might be some variation in the true octane rating of the fuel, it would not hurt to use the 100 octane -- especially if you live in a country where fuel is cheap compared to the rest of the world. If you live in a well developed country and fuel is expensive due to taxes, then I would imagine I would stick with the 98 octane.

 

As long as it's not leaded, you can use it.

 

kind of a separate question, say we were talking 100 octane here in the states, couldn't that damage the catalytic converter?

Dave