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The Spike Line is a new feature here at TheGasGame.com. Here we will use the Chicago Spot price of gasoline as a basis to determine a “Spike Line”. When you see the Spike Line deviation close to zero or in the negative, the likelihood of a spike is greater. More information on the formulas used to figure the taxes and fees adjustments can be found below. Click on a picture to the right to see a larger view.

Spike Line Statistics for 03/11/10 ($USD) Indy, Indiana, Michigan Chicago Spot 2.1020 Change UP 0.0019 USA Average 2.7790 ($USD) Indy Indiana Michigan Ohio Taxes and Fees 0.5806 0.5806 0.5837 0.4918 Spike Line Price 2.6826 2.6826 2.6857 2.5938 SSA Average 2.7275 2.7388 2.7744 2.7539 Average 2.7440 2.7300 2.7190 2.6840 Spike Line Deviation 0.0449 0.0562 0.0887 0.1601 Gas Price Statistics ($USD) Indy Indiana Michigan Ohio Low 2.6390 2.5590 2.5190 2.4990 High 2.7590 2.7990 2.9990 2.7990 Speedway Low 2.6390 2.6390 2.6190 2.5490 Speedway High 2.7590 2.7990 2.8190 2.7990 Diesel Price Statistics ($USD) Indy, Indiana, Michigan Chicago ULS Diesel 2.1200 Change -0.0012 ($USD) Indy Indiana Michigan Ohio Taxes and Fees 0.8134 0.8134 0.8112 0.6040 Spike Line Price 2.9334 2.9334 2.9312 2.7240 SSA Average 2.8718 2.8899 2.8704 2.8733 Spike Line Deviation -0.0616 -0.0435 -0.0609 0.1493 SSA Low 2.8390 2.7990 2.7590 2.7190 SSA High 2.9990 2.9990 2.9990 2.9990

Indy Spike Line Chart Indiana Spike Line Chart Michigan Spike Line Chart Ohio Spike Line Chart

Taxes and fees formula for Indianapolis/Indiana

CS + (CS*.07) + ST + FT + IC + CO + FR

CS = Chicago Spot
CS*.07 = Indiana Sales Tax (7%)
ST = State Tax or 18c
FT = Federal Tax or 18.4c
IC = Inspection Charge or 1c
CO = Cost adjustment or 8c
FR = Freight cost or 5c

Taxes and fees formula for Michigan

CS + ((FT + CS)*.06) + ST + FT + EC + CO + FR

CS = Chicago Spot
ST = State Tax or 19c
FT = Federal Tax or 18.4c
((CS + FT)*.06) = Michigan Sales Tax on Chicago Spot and Federal Tax
EC = Environmental Charge or 1c
CO = Cost adjustment or 8c
FR = Freight cost or 5c

Currently I am adding 19.1 cents to the Indy/Indianapolis diesel taxes and fees and 15.9 cents to the Michigan diesel taxes and fees based on how much more taxes are for diesel on the GasBuddy Gas Taxes chart.