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lumpy70 · 12-10-05, 10:12 AM

Calculations and charts and tables and guessing aside, the ONLY way to accurately measure your speedo and odometer is by using a GPS.

Drive at 100 kph on the GPS, and see what your speedo is saying. If it says 105 kph, you are 5% out. Therefore 60 kph indicated is actually 63 kph, and so forth. When you fuel up and look at your odometer, multiply (or divide) your distance on that tank by your percent out and voila...exact numbers.

Sorry if I seem like I'm dumbing this down, but when I hear
"well, I'm running bigger tires, so my mileage is a bit better that what is indicated" it bugs me.

Craig.

12-10-05, 10:12 AM	#77
lumpy70 IH8MUD Regular Join Date: Nov 2004 Location: Calgary Posts: 438	Calculations and charts and tables and guessing aside, the ONLY way to accurately measure your speedo and odometer is by using a GPS. Drive at 100 kph on the GPS, and see what your speedo is saying. If it says 105 kph, you are 5% out. Therefore 60 kph indicated is actually 63 kph, and so forth. When you fuel up and look at your odometer, multiply (or divide) your distance on that tank by your percent out and voila...exact numbers. Sorry if I seem like I'm dumbing this down, but when I hear "well, I'm running bigger tires, so my mileage is a bit better that what is indicated" it bugs me. Craig. __________________ Sadly no longer owning a 70 1993 HDJ81 TLCA # 13682 VA6LMP