Ok here it is. This is the new revised version. The numbers can easily be plugged into an excel sheet to play around with. Here is what I've been using.
Base formula
Mileage = (LN(10) - LN(TBN * Sump in quarts)) / K
K conventional = -0.00025055
K blend = -0.00020879
K synthetic = -0.00016703
Turbocharger/direct injection
Mileage ^ X
X Conventional: 0.94002
X Blend: 0.94729
X Synthetic: 0.95456
"Easy on oil" factor - Generally Japanese 4-cylinder motors
Mileage ^ 1.032242
Hard driving/Racing
Mileage ^ 0.91862
Here is an older version of the formula i experimented with:
Mileage = SQRT((TBN - 2)*Sump on quarts)*1000
Base formula
Mileage = (LN(10) - LN(TBN * Sump in quarts)) / K
K conventional = -0.00025055
K blend = -0.00020879
K synthetic = -0.00016703
Turbocharger/direct injection
Mileage ^ X
X Conventional: 0.94002
X Blend: 0.94729
X Synthetic: 0.95456
"Easy on oil" factor - Generally Japanese 4-cylinder motors
Mileage ^ 1.032242
Hard driving/Racing
Mileage ^ 0.91862
Here is an older version of the formula i experimented with:
Mileage = SQRT((TBN - 2)*Sump on quarts)*1000
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