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.
How often should I change my oil? (New to bikes) Hey everybody, I have an '82 Hondamatic CM450A. I changed the oil last May when I got it and my grandpa told me that he only changes the oil on his Honda once a year. Well I'm nearing 2000mi since that oil change and I'm starting to get a bit paranoid. A friend of mine who rides an 80's Yamaha told me he changes his oil every 1000mi.