Anyone heard of Diesel Power + additive? Picked it up from Ford dealer up here in Canada. 16 oz bottle does up to 500 gallons. Supposed to add one ounce per 32 gallons of fuel. Gives 5 cetane boost and does all the rest of the advertised improvements. Cost about $13 canadian. Just trying it on the first tank. 1 oz per tank does not seem like alot though.