I didn't see the QS advertisement on the first page, just the Mobil ad on the back of the flyer. I figured for $8.99 I couldn't go wrong.
If that oil has some detergents in it that's great, I'm sure my Saturn engine could use it. I Seafoam'd the crankcase a couple of times along with the PCV, after those treatments the car was noticeably smoother.
Edit.. I finally looked that Mobil website for this oil. It doesn't appear to be all that bad. Especially for my older daily drivers.
http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_Clean_5000.aspx
Quote:
Mobil Clean 5000
Want a conventional oil that protects for today's longer oil change intervals? No problem. With Mobil Clean 5000, you’ll get 16 percent more cleaning agents than our conventional oil, Mobil Clean (available in installed facilities only). Extra cleaning power that helps your engine run cleaner than with other conventional oils — even with today’s longer oil change intervals. In fact, Mobil Clean 5000 is guaranteed to provide excellent performance and protection for all car engines for up to 5,000 miles of normal consumer driving.
Quote:
# Proven protection of critical engine parts from lubricant-related failure for 5,000 miles or six months, whichever comes first.
# Designed to exceed most engine warranty requirements.
# Outstanding wear protection for critical engine parts during today's longer service intervals.
# Extra cleaning performance to help prevent the formation of sludge and harmful deposits.
# Meets key industry and OEM requirements (see specific viscosities).