i took my 2000 cavalier in yesterday to have big 10 take a look at it cause the red oil light came on when ever i stoped my car. they checked the oil level and it wasn't bad but they changed the oil and the filter " basic oil change" and the light gose away. the guy calls me a said its all fixed. i drove it that same night about 30 min after i picked it to go to tampa around 30 miles into the trip the power of the car slowed up and i started to pull over thats when i herd the knoking noise and when i stoped the oil light came on. i got a tow truck to take it back to big 10. This morning i went over there to tell them what had happend when i went out to check the car and turn it on i herd it knock lightly once and and then nothing. did i save my enging in time or is it still screwed. also should i try to go after big 10 for not fixing the problem in the first place cause i no a replacement engine is not cheap.