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i guess i'll share:
i've used slick50..... once..... pretty sure it did nothing but thin out my wallet.
anyways, did more research on the lubromoly/petromoly, turns out some of the BITOG guys have also played with it, reports of 3% gains seem to be the norm, even when used in oils that already have decent amounts of moly in them.
looks to cost about $9/quart at most stores. most seem to use a "full" dose once, then half doses afterwards to keep the level of moly in the oil after a change high enough to have an effect.
at a 3% gain at 30MPG, that's 30.9MPG. assuming a 5,000 mile oil change interval, you'll burn through 161.81 gallons of gas instead of 166.67 gallons, a difference of 4.86 gallons. assuming $3.50/gallon, that's $17.01 of fuel saved by spending $9 on an oil additive. that's for the initial dose. "maintenance" doses, $17.01 by spending $4.50.
and if you run oil changes longer than that, you'll save more.
so, pretty small number, but interesting to see something having a benefit.
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