did you know on your car with a device called a TOPSIDER you can pull the old oil out of the dipstick tube yourself, change the filter and refill? Saves money from having a tech do it.

one thing to think about is not simply the oils ability to maintain longevity but also the ability of the oil to perform when fresh in comparison to other oils.

search the web ( www.mobil1.com or REDLINE OILS site ) and develop an opinion on how well the oils flow, react to heat, to being compressed, attach to metal.