I switched over to Mobil 1 about 2 yrs ago with around 240k miles. I use about a quart in 10,000 miles (not leaking). Change every 10,000 miles with a Wix XP filter. Mobil 1 High Mileage formula 10-30. I do this in all my vehicles with no leaking at all.
same here...would like part #s...aftermarket? By the way I'm back with a slightly different handle and low post count since my house burned down. Starting over on all accounts.