Vendor 1 says it will cost you $50,000 and it will take 4 months, vendor 2 says it will cost you $100,000 and it will take 2 months, vendor 3 says it will cost you $60,000 and it will take 3 months. The average bid is $70,000, which what you put when estimating the cost of this task in your project budget. Vendor bid analysis can also be used to estimate the length of the task, by averaging all the durations submitted by the vendors in their bids. In the above example, the average length of the task is 3 months.
These days they both recommend every 5,000 miles and change the filter every time. And some people now say oil will last 10,000 miles, and we would protect the environment by not changing it as often. A 125cc bike engine works harder than a car. So I'd say changing it every 3000 miles might be justifiable.
Angie Hicks, Angieâs List founder: âYears ago the time to change your oil was really simple â every three months or 3,000 miles. With the improvements made to engine oil as well as cars you need to depend on your ownerâs manual for the best recommendation of how frequently your car may need an oil change. It could be 3,000, 7,000, even 10,000 miles.â.