I believe the Valvoline stuff you can get is 100%.
It's in a silver plastic container.
I got mine at Pep boys. It costs about $3. 50 per quart.
HTH Eric
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98 Quad cab 4X4 2500 12 valve,5 speed,3. 54 rears, 8' bed. Michelin 275 75 16 lr-E. Boost and egt gauges but basicly stock except for a "properly adjusted" AFC. Cat in the garage. Uniden HR 2510, Texas Star 1200 amp. 63,000 Mi as of 1/27/01.
NRA life member. High power/IDPA.