Be careful...my dad went to WalMart and picked up a 5 quart jug of Mobil 1. He took his Vette to a shop near his house to have the oil changed. When the mechanic went to put the new oil in, the jug was full of water mixed with a little oil. They drained the little that was in the car replaced it with a new jug. The mechanic said that the silver seal on the top was not there so someone took the oil and replaced it with water then brought it back. Make sure you have a seal on your oil can if you buy it from a retail store. 


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