New owner of my dream car. Bought for cheap from original owner who has every receipt of work. There are a few problems mostly interior and radio. But there's a problem with the anti locking system that I want to fix asap. When I start the car either the anti lock light is on and I have no problems with the brakes or its off. When it's off and I'm driving the first or second time I brake there a lot of "feedback". I'm not sure how to explain it other than a weird noise, not grinding, and the brakes resisting. From what I read either I need to replace the sensor or its something terrible. Does anyone else have this problem? Any insight?

 

Another questions will be what's the best oil for summer? I live in the coachella valley where it gets to 115+ and I've heard different things. What's your opinion?