This calculator is designed to supply the area of any potential collection surface of any length and width in square feet and/or square inches, based on the length and width values entered in feet and inches, and the potential and estimated actual rainwater recovery in gallons.
It depends! Read the owner's manual for the brand of car you own or want to drive as each auto maker determines when to change the oil. Generally, I've read and experienced that full synthetic oil can last up to 5K-7500 miles, but... it also depends on other factors such as your driving style and where you live. VW has listed in its newer cars, like the 2015 VW Golf, that oil changes can be done in 10k miles!
People who do oil tests to determine how long the oil is lasting in their cars often report over 15K miles before the synthetic oil is âworn outâ and that is probably more intelligent than getting the mileage out of a book. Personally, I consider that a little hard core and just go by what the manual says.