Hotter is relative. 7 degrees C will not affect anything but provide a more efficient heater. 87 C is approx 195 F. so its well within normal range. The main concern with any engine regarding temperature is that it is stable. If it rises to 87 quickly and stabilizes there then the integrity of the cooling system is intact. An engine operates more efficiently at a higher stable temperature. Internal parts move easier so possibly better economy and a slight improvement in power. Most new cars stabilize at 200 to 215 degrees as mandated by emission requirements and produce less pollution because of it. So dont dwell on it.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.