So this is my first Toyota and I'm loving it. It is a 91 4runner 3.0 and well first thing is it idles high between 1500 and 2000 but all the time just most of the time what can I do about this and what kind of oil weight of oil should I put in it it does say about 250000 on the odometer and it runs great doesn't leak a bit and I think the night idle is killing my city mileage so what can I do and expect from this new found love of mine