I have a 1994 C180 Euro version which only has a 1799cc engine for such a "big and heavy" car. The engine block with twin overhead cams on top looks huge sitting in the engine bay! Just look at my Toyota Corolla with an 1800cc engine and it looks like a Dinky Toy. Has anyone tried to increase the engine output or horsepower successfully without any serious changes like adding a Kompressor or turbo? Let me know as I am unable to overtake slow cars on the roads here. Are the octane boosters in shops any good or are they teasers only? Will it adversely affect my car if I put this in with the next full tank? Does it have any noticeable affect to speed? Will it spoil my engine due to timing, increased wear and tear or whatever? Thanks. I normally use Premium unleaded fuel as recommended by the Benz dealers.

Waste of money. You only need to run the minumum octane your motor needs. Octane slows the combustion process. More octane, slower and even burn. Less octane, faster burn. If it says 91, just use 91.

Thanks Royaiii. The bottles for octane boosters indicate it would make my car go faster. All lies? What about the nitro that drag cars and street racers are using just for my information? I am now using the fuel injector cleaner additives which seem to be working on my 8 year old car with 189,000kms to date. My only concern is that the motor gets a bit difficult to drive over 100kph as it goes up to 3000rpm( no passengers) and feels like its labouring. Is this because of the 4speed box, bad aerodynamics, too heavy weight? My other automatic cars which are Corolla 1800cc and Camry 2200cc feel very leisurely at even 110kph plus and doing only 2400 to 2500rpm. The Benz pedal becomes tiresome over long 100kms plus trips as it has no Cruise control on board. I know somebody will tell me to sell it and get at least a 280 model or a new Kompressor.

Race cars are using motors with extremely high compressions. More compression means more power (Simple definition, applicable in this explanation). Those drag cars run so much compression that the motor is only good for a couple runs. Unless you modified the engine, you only need to run the minimum octane. Those octane boosters are good for people who have turbo engines that have modified their turbo computer making even more boost thus more compression. The biggest lie is that it makes all cars go faster. Only a handful of cars benefit from octane booster.

Fuel system cleaner is a little controversial but I don't use it in any of my new model cars, MB is adamant about no fuel cleaners. I only put a bottle in my 300E lately because I will replace my O2 sensor soon and fuel filter and I have new fuel pumps. If you are going to use cleaners just techron or valvoline synpower..nothing else. Also a common fallacy is that you add the cleaner after an oil change. You want to add it a tank before the oil change so that you can drain all the crap that comes out. By adding cleaners, you are putting a number of components at risk. Everything in the fuel system, and sensitive O2 sensors + cats are put at risk. My recomendation, go get your car serviced than wasting money on these snake oils.