My 87 Acura Integra developed oil leaks around 100k (now 158k).
I saw on the Men’s magazine to use Valvoline High mileage oil - I switched to it around 110k. No more leaks. This car uses 10W30.
I met a m/c uses Kendall on his 80s 3seris BMW - its got 500k now.
It makes me to wonder if i should do anything differently?