I am getting ready to change my engine oil. I have used transfer pumps on boat engines in the past. What are you guys using to extract your oil for a change? I was going to look at Northern supply & west marine but would like to no what others are using. I have the M11 engine. I plan on using 3-6 gal tanks I have to contain the old oil. <br/><br/>Who do you use for oil analysis?...