I've gone 14k on the same SCHAEFFERS 9000 FULL SYN , even had it anylized/partical count, it was still good and well below the ppm standard for material in the oil-wear.
the series # 'like 7000,9000..is the recommended change interval.
saves lots of $$$
there are dealers all over the country, the oils 4.75'ish a quart, not even expensive really compared to red line- royal burple-amsoil-lucas-brad penn.
Trinity Automotive sells it in colleyville
Napa in grapevine sells it too
really...it's take your pic when it come to the exotic oil level, I've picked mine.
