Here is an example. PurePoer, a GII+ oil does not say synthetic but has a description that is pretty impressive, and it costs about the same as oils like Red Line, $7.95 a quart, in case lots. The following description is pretty impressive. For a price like that, what are you getting? The problem is that it might be worth the money. How would you know?
quote:Pure Power! SAE 10W/30 CI-4/SL* Motor Oil is API Licensed for Long Drain and Energy Conserving. Pure Power! has an extremely high TBN/Alkaline Reserve (13+) which effectively neutralizes corrosive acids to protect bearings and other vital surfaces. Pure Power! extends motor oil change intervals 2-4 times, lowers operating temperatures, lowers emissions, increases fuel mileage and increases horsepower. These are just some of the benefits from using Pure Power! EHP Motor Oils. API Service Classification CI-4/SL*, exceeds O.E.M. requirements for alternate fuel, gasoline and diesel engines. Pure Power! Motor Oils are proven to be extremely cost effective when used in conjunction with an effective Oil Analysis Program. Pure Power! provides superior internal protection for gasoline, diesel, natural gas, propane, methanol or turbo-charged engines. Exceeds GM specification 6069M, Ford Specification M2C153E, Mack T-9 Specification Mack’s preferred recommendation is SAE Grade 15W/40. Not recommended for Electro Motive Diesel engines with silver bearings. Meets MIL-L-63460 requirements. *Qualifies Long Drain & Fuel Conserving 1Case/12Quarts