I know any oil topic can open a can of worms but my main question is if you guys/gals are using high mileage synthetics and at miles you start at. I am new to Land Cruisers. I have had mostly Jeeps. I just sold my last Grand Wagoneer to buy the Land Cruiser. It's a 2009 with 130,000 miles. In the past I would switch to High Mileage around 100,000. I use Mobile 1. Thanks for any input.