Leaks are caused by the condition of the seals. Slippery synthetics are less forgiving of hardened seals, but the oil doesn't CAUSE the leak, bad hardened seals do.
Higher mileage is actually better for seals than just sitting for years.
Choosing oil based on leakage vs performance is not the choice I would make, but each person has their own priorities.
Higher mileage is actually better for seals than just sitting for years.
Choosing oil based on leakage vs performance is not the choice I would make, but each person has their own priorities.