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TIL the main vehicle for the US Postal Service, the Grumman LLV (Long Life Vehicle), gets an average fuel economy of 10 miles per gallon. ( en.wikipedia.org ) submitted 3 years ago by mytimeoutside 5
Typically, motor oils stay stable and have a shelf life of up to five years. However, this stability can depend on a number of factors and it is always advisable to follow the manufacturer’s storage instructions. You must also keep a watch on the expiry date and refrain from using the motor oil once it has crossed that date.