Quote:
Originally Posted by S Keith
Let's assume 7% is a real number. Let's use easy math and say the propulsive efficiency jumps from 20% to 27%. That's a huge change, which draws the 7% claim into question, and it's nearly 30%, which is where I suspect the 30% emissions number comes from, but we're still only only utilizing 27% of the heat energy burned vs. 80% with regular oil.
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"Easy math" often means you are doing it wrong.
You need to pay attention when working with percentages. A 7% increase of 20% is not 27% but 21.4% (Multiply by 1.07 not add 7%).
If the claims are close to accurate for emissions and wear, it's because of improved warm-up times as Ecky stated. However, just one high RPM romp with 300°F oil could easily negate all reduction in wear...