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Engine oil usage
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Pontiac 2000 Bonneville LS
Engine oil usage

My car blew the engine. I had 2 options: buy a new or used one. I chose new from GM w/3 year warranty. Dealer says we need for them to change the oil because wrong oil usage could cause warranty to be invalid. They also said the engine could use 1 to 2 quarts of oil every 3,000 miles. I have had GM vehicles that I have driven ...