Love Toyota, bought this truck used from the dealer with 99000. That was 4 yrs ago, truck ran great. At 155000 truck started using excessive amounts of oil. I always had dealer change the oil around 4,000-5,000 miles, and I thought they had forgotten to add oil after a change and driving 1000 miles. Now there's a horrible piston slap on start up and it uses about a quart every 500 miles. Sure would like too know what happened sure isn't typical of Toyota.