I bought 5 quarts of this oil at wally world tonight. The brand is "ACCEL' and it's 10W-40. The bottle states that it is "SF quality for model years 1988 and earlier". Then it states on the back: "...recommended for gasoline engines in older cars and trucks prior to 1989. This oil provides oxidation stability and antiwear performance relative to oils meeting the prior API performance standard SE. This oil also provides protection against engine deposits, rust and corrosion." Then it also says again that it is SF rated and not suitable for use in engines built after 1988. It is distributed by "Warren Performance Products" So is this oil like the old stuff that will protect flat-tappet camshafts? It is only $2.19/quart.