.7kg
They may be referring to the octane level of the fuel.
Does a BMW X5 need to use 95 octane fuel in Australia
Using 95 octane fuel in an engine designed for 92 octane will not cause overheating. Higher octane fuel can actually improve performance and prevent knocking, as it is more resistant to premature ignition. However, if the engine is not tuned for the higher octane, any benefits may be minimal, and overheating is more likely linked to other factors such as cooling system issues or engine load rather than fuel octane rating.
RON stands for Research Octane Number, which is a standard measure of a fuel's ability to resist knocking in a combustion engine. An octane rating of 95 RON indicates that the fuel has a higher resistance to knock compared to lower octane-rated fuels.
95
no it can not
91-93 octane premium
87 the de-tuned LT1 will not run as efficiently on higher grade fuel
For a Toyota Corolla, using octane 91 is typically adequate, as the vehicle is designed to run efficiently on regular unleaded fuel. While octane 95 may provide slightly better performance in some cases, it is generally unnecessary and does not significantly enhance the Corolla's fuel efficiency or engine longevity. Always refer to the owner's manual for the manufacturer's recommendations regarding fuel grades.
It sounds to me you are using a fuel to low in octane, either that or your timing is wrong. Try running on 95 or higher octane fuel.
My site has quite a bit of info relating to this http://www.maintainyourcar.com/ It depends on what car gives better fuel economy. Some cars that were designed to run on higher octane will give you better performance when using the correct fuel and your fuel economy. Check with your manufacturer. With a Mercury Cougar You could try 91 octane or 95 octane, at least 91 octane will give you a bit better economy Consider servicing the car too that can help!
Depends on the model/year/engine. Use exactly what the owner's manual lists. If you do not have an owner's manual then contact a Mercedes dealer for the correct octane fuel.