A two-stroke or four-stroke marine engine lubricating oil composition comprising an oil of lubricating viscosity in a major amount and additives in respective minor amounts; and a polymethacrylate viscosity modifier. The touch surface is arranged in such a way that it can be moved under pressure from a first end position to a second end position. The example system comprises a key phrase field for accepting a search term, a data table and a search unit. The NMR experiment is well applicable on hyperpolarized nuclei within a patient, with reduced losses of magnetization due to relaxation processes. Since the sum always must attain the same value as determined by reference voltage, when the lamp voltage increases from its nominal or initial value, the lamp current is decreased by a corresponding ratio to maintain a constant power in the gas discharge lamp. The web index may now be updated and stored by the system.